Liquid sulfonylurea- and li-salt containing herbicidal compositions

ABSTRACT

This invention relates to a liquid herbicidal composition comprising a non-aqueous solvent system, at least one sulfonylurea herbicide and at least one inorganic or C 1 -C 12  organic lithium salt. The invention also relates to the use of an inorganic or C 1 -C 12  organic lithium salt to improve chemical stabilisation of a sulfonylurea herbicide in a liquid composition comprising a non-aqueous solvent system.

1. FIELD OF THE INVENTION

This invention relates to liquid herbicidal compositions comprising anon-aqueous solvent system, at least one sulfonylurea herbicide and atleast one lithium salt as will be described herein. The invention alsorelates to the use of a lithium salt as will be described herein toimprove chemical stabilisation of sulfonylurea herbicides in liquidcompositions that comprise non-aqueous solvent systems.

2. BACKGROUND OF THE INVENTION

End-users typically prefer liquid herbicidal compositions over solidcompositions because they are easier to handle in measuring, pumping,diluting and dispersing in water, and spraying operations and alsogenerally exhibit superior biological efficacy. Typical liquidformulations include oil-based formulations such as oil dispersions(OD), emulsifiable concentrates (EC), and soluble concentrates (SL)where one or more active ingredients are dissolved in and/or suspendedin the liquid media of the formulation.

Sulfonylureas are a well-known and important class of herbicidescomprising more than 30 active-ingredients that are widely used forcontrolling a range of annual and perennial broad-leaved weeds andgrasses in a wide variety of agricultural and horticultural crops, aswell as in turf, pastures and non-crop situations. However,sulfonylureas are known to be unstable as they have a tendency tohydrolyse via cleavage at the sulfonylurea bridge. While thisinstability is sometimes considered favourable in terms of achieving lowsoil residues of these compounds, it poses serious problems commerciallywith respect to the storage stability of the formulated products.Furthermore, some sulfonylurea herbicides are also prone to degradationdue to chemical incompatibilities when other herbicidal ingredients areincorporated in the formulation. This makes the development of liquidformulations that comprise sulfonylurea herbicides and additionalherbicidal ingredients even more challenging.

While liquid herbicidal formulations such as oil dispersions have beencommercially available for a long time (with early patents dating fromthe 1980's and 1990's such as GB 2,059,773 and U.S. Pat. No. 5,707,928),the inherent chemical instability of sulfonylurea herbicides has limitedtheir widespread use in liquid formulations. Instead, sulfonylureacompounds are normally formulated as powders, granules and tablets (e.g.see EP 0 764 404 A1, WO 98/34482 A1, WO 93/13658 A1, and WO 02/17718A1). However, some efforts to stabilise liquid formulations ofsulfonylurea herbicides have been described in the art.

For instance, US 2006/0276337 A1 (Bayer CropScience GmbH) describes anoil suspension concentrate comprising one or more pyridylsulfonylureacompounds suspended in one or more organic solvents optionally with asulfosuccinate salt. The oil suspensions are reported to bestorage-stable but no quantitative measurement regarding stability isprovided. WO 2005/011382 A1 (Bayer CropScience GmbH) reports thatinorganic salts can be used to stabilise sulfonylureas in a liquidformulation.

WO 2007/027863 A2 (E.I. du Pont de Nemours & Co.) is also concerned withproviding stable sulfonylurea-containing liquid compositions anddescribes an oil suspension concentrate comprising one or moresulfonylurea herbicides, additionally one or more fatty acid esters ofC1-C4 alkanols, and a lignosulfonate. The stability of thesecompositions was found to vary dependent on the sulfonylurea that wasused. Although the document is concerned with providing stablecompositions, up to 66.5% of tribenuron-methyl was lost after only oneweek of storage at 40° C.

U.S. Pat. No. 5,731,264 (ISP Investments Inc.) describes a liquidemulsifiable concentrate comprising a sulfonylurea and a mixture ofanionic and non-ionic surfactants dissolved in a solvent selected fromgamma-butyrolactone, propylene glycol or propylene carbonate or mixturesthereof. The obtained formulations, comprising metsulfuron-methyl whichis considered to be of average stability, are reported to have ahalf-life of 5.8 days at 52° C. After 5 days, between 25-30% of themetsulfuron methyl was lost depending on the selected solvent.

WO 2008/155108 A2 (GAT Microencapsulation AG) describes oil suspensionsof sulfonylureas and organomodified silane compounds that are reportedlystable when stored at comparatively gentle accelerated storageconditions of 35° C. for 15 days. In WO 2009/152827 A2 (also GATMicroencapsulation AG) the more usual accelerated storage conditions of54° C. for two weeks are used but in this document the chemicalstability of the sulfonylurea in the suspension concentrates is notreported.

EP 0554015 A1 (Ishihara Sangyo Kaisha, Ltd.) describes a chemicallystabilized herbicidal oil-based suspension, comprisingN-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl-3-dimethylaminocarbonyl-2-pyridinesulfonamide and/or itssalt as an effective herbicidal component, urea, a vegetable oil and/ormineral oil, a surfactant and, optionally other ingredients such as anadditional herbicidal component, a thickener, a solvent and otheradjuvants. According to that document, urea is added to suppressdecomposition of the effective herbicidal component and to provide achemically stabilized herbicidal oil-based suspension.

GB 2496643 A (Rotam Agrochem International Company Ltd.) aims to improvethe suspension concentrate described in EP 0554015 A1. This document isconcerned with pyridine sulfonamides (i.e. pyridylsulfonylureas) andteaches to add a polyether-polysiloxane to the composition to counteractsupposed poor spreading and water dispersibility caused by the additionof urea or other stabilizers to a suspension concentrate.

EP 0 124 295 A2 (E.I. du Pont de Nemours & Co.) reports that aqueoussuspensions of sulfonylureas can be stabilized by the presence ofammonium, substituted ammonium or alkali metal salts of carboxylic acidor inorganic acid provided that the salts exhibit specific solubilityand pH properties. Exemplary salts are said to be diammonium hydrogenphosphate, ammonium acetate, lithium acetate, sodium acetate, potassiumacetate, or sodium thiocyanate.

WO 03/051114 A1 (ISP Investments Inc.) is concerned with increasing theshelf-life of an oil-in-water microemulsion containing a biologicallyactive aza type compound. The oil-in-water microemulsion contains from90 to 99.99 wt. % water. Shelf-life is said to be extended by theaddition of a buffering agent to the emulsion. The buffering agent is analkaline buffering agent such as an inorganic Na, K and or NH₄ salt of aphenol, a polyphenol or a weak acid; an alkanol amine; a polyamine saltof a weak acid or a mixture of these buffering agents. No stability datais provided for any sulfonylurea-containing formulations.

WO 2013/174833 A1 (Bayer CropScience AG) describes an oil dispersionformulation of iodosulfuron-methyl sodium salt which comprisehydroxystearates, in particular lithium hydroxystearate as both athickener and a stabilizer for the sulfonylurea.

U.S. Pat. No. 4,599,412 A describes a process for the preparation ofhomogeneous solution formulations of sulfonylureas with reportedlyimproved chemical stability, by contacting said solutions with molecularsieves.

Despite the available art described above, only a few active ingredientsin the sulfonylurea family have been incorporated into commerciallysuccessful liquid formulations. Despite their lengthy presence in themarket, there are still no commercially successful oil-based liquidformulations of many important sulfonylureas includingchlorimuron-ethyl, metsulfuron-methyl, triflusulfuron-methyl,tribenuron-methyl, thifensulfuron-methyl, chlorimuron-ethyl, rimsulfuronand sulfosulfuron. There is a clear need for an improved formulationsystem to reliably deliver liquid formulations of improved chemicalstability for a broader range of sulfonylureas and for co-formulatedmixtures of sulfonylureas with non-sulfonylurea herbicides.

3. SUMMARY OF THE INVENTION

The present invention is based on the surprising finding that thechemical stability of many sulfonylureas in a liquid compositioncomprising a non-aqueous solvent system can be improved by incorporatinginto the composition at least one inorganic or organic lithium salt,wherein the organic lithium salt is selected from the C₁-C₁₂ carboxylicacid salts of lithium.

Accordingly, the present invention relates to liquid herbicidalcompositions comprising: a non-aqueous solvent system; at least onesulfonylurea herbicide; and at least one inorganic or organic lithiumsalt, wherein the at least one organic lithium salt is selected from theC₁-C₁₂ organic carboxylic acid salts of lithium. Preferably, theinorganic and C₁-C₁₂ organic acid salt has a molecular weight of 250 orless. Preferably, the C₁-C₁₂ organic carboxylic acids are mono ordicarboxylic acids. In one embodiment of the invention the C₁-C₁₂organic carboxylic acid salt is selected from lithium acetate, lithiumformate, lithium citrate, lithium succinate, lithium octanoate, andlithium benzoate. In a further embodiment of the invention the inorganicacid salt of lithium is selected from lithium carbonate, lithiumsulfate, lithium phosphate, lithium chloride, lithium iodide, lithiumbromide, lithium nitrate, and lithium borate. The present invention issuitable for chemically stabilising liquid compositions comprising one,two, three, four or more different sulfonylurea compounds.

The liquid herbicidal composition is preferably formulated as an oildispersion (OD), a dispersible concentrate (DC), an emulsifiableconcentrate (EC), or a soluble concentrate (SL). At least onesulfonylurea is dissolved, suspended or otherwise contained in thenon-aqueous solvent system. At least one inorganic or organic lithiumsalt as described herein is dissolved, suspended or otherwise containedin the non-aqueous solvent system.

The liquid herbicidal composition of the invention may comprise one ormore non-sulfonylurea herbicides that are suspended, dissolved orotherwise contained in the non-aqueous solvent system. The presentinvention is particularly suitable for improving the chemical stabilityof a sulfonylurea in the presence of a non-sulfonylurea herbicide thatwould ordinarily impair its chemical stability.

The liquid herbicidal composition may comprise one or more safeners. Theliquid herbicidal composition may also comprise co-formulants such assurfactants, particularly non-ionic surfactants.

The invention also relates to the use of a lithium salt to improvechemical stabilisation of a sulfonylurea herbicide in a liquidcomposition comprising a non-aqueous solvent system, wherein the lithiumsalt is an inorganic lithium salt or an organic lithium salt selectedfrom the C₁-C₁₂ organic carboxylic acid salts of lithium.

4. DETAILED DESCRIPTION OF THE INVENTION 4.1 General Remarks

As used herein, the terms “comprises”, “comprising”, “includes”,“including”, “has”, “having” or any other variation thereof, areintended to cover a non-exclusive inclusion. For example, a compositionthat comprises a list of components is not necessarily limited to onlythose components but may include other components that are not expresslylisted or inherent to such a composition. That said, the terms“comprises”, “comprising”, “includes”, “including”, “has”, “having” orany other variation thereof also cover the disclosed embodiment havingno further additional components (i.e. consisting of those components).By way of example, a composition comprising a sulfonylurea, a lithiumsalt, an organic solvent, and a surfactant discloses the compositionwith just these four components as well as compositions comprising thesefour components along with other unmentioned components.

Also, the indefinite articles “a” and “an” preceding an element orcomponent of the invention are intended to be non-restrictive regardingthe number of instances (i.e. occurrences) of the element or component.Therefore “a” or “an” should be read to include one or at least one, andthe singular word form of the element or component also includes theplural unless the number is obviously meant to be singular. By way ofexample, reference to a composition comprising a surfactant should beunderstood to mean that the composition comprises one or at least onesurfactant unless specified otherwise.

Further, when an aspect of the invention is described as being‘preferred’, it should be understood that this preferred aspect of theinvention can be combined with other preferred aspects of the invention.By way of example, if iodosulfuron-methyl is described as being apreferred sulfonylurea, and isobornyl acetate is described as being apreferred organic solvent, and lithium acetate is described as being apreferred salt, then the present disclosure should be taken to also be adisclosure of a composition incorporating these preferred components.

4.2 Liquid Composition

The herbicidal composition of the invention is a liquid. By “liquid” ismeant that the composition takes the form of a liquid at standardtemperature and pressure. Suitable liquid compositions that can be usedin the present invention include the oil-based liquid formulationsdefined in the “Catalogue of pesticide formulation types andinternational coding system”, Technical Monograph No. 2, 6th Ed. May2008, CropLife International. Exemplary liquid compositions for use inthe present invention include a dispersible concentrate (DC), anemulsifiable concentrate (EC), the liquid part(s) of a solid/liquid (KK)or liquid/liquid (KL) combi-pack, an oil dispersion (OD), an oilmiscible flowable concentrate (OF), an oil miscible liquid (OL), anoil-based soluble concentrate (SL), a spreading oil (SO), an oil-basedultra-low volume liquid (UL) or suspension (SU), or any other oil-basedliquid not yet designated by a specific code in the CropLife monograph(AL). Of these, oil dispersions (OD), dispersible concentrates (DC),emulsifiable concentrates (EC), and oil-based soluble concentrates (SL)are preferred. These and other formulations are known in the art and aredescribed, for example, in “Pesticide Formulations” (1973) by Wade vanValkenburg, and “New Trends in Crop Protection Formulations” (2013)edited by Alan Knowles.

The invention is particularly suited to improving the chemical stabilityof sulfonylureas in oil dispersions (OD), emulsifiable concentrates(EC), and soluble concentrates (SL). Accordingly, these types offormulation are the most preferred for the present invention. The term“oil dispersion” is to be understood as meaning a dispersion concentratebased on a non-aqueous solvent in which one or more solid activecompounds are suspended and wherein further active ingredients areoptionally dissolved in the non-aqueous solvent. In one embodiment atleast one sulfonylurea compound is suspended in the non-aqueous solventsystem. Additional sulfonylurea compounds may be co-suspended and/ordissolved in the non-aqueous solvent system. In addition to the one ormore sulfonylurea compounds, one or more non-sulfonylurea herbicidalcompounds may be suspended and/or dissolved in the non-aqueous solventsystem. Preferably the inorganic or C₁-C₁₂ organic lithium salt is alsosuspended in the non-aqueous solvent system.

In the absence of any indication to the contrary, the terms “suspended”and “dissolved” take their ordinary meaning in this technical field.Whether a compound is suspended or dissolved can be determined atstandard temperature and pressure. For the avoidance of any doubt, theterm “suspended” can be taken to mean that 80 wt. % or more, preferably90 wt. % or more, even more preferably 95 wt. % or more of the compoundin question is suspended within the liquid composition whereas the term“dissolved” can be taken to mean that 90 wt. % or more, preferably 95wt. % or more, even more preferably 99 wt. % or more of the compound inquestion is dissolved in the liquid composition.

4.3 Sulfonylurea

The liquid composition of the present invention comprises asulfonylurea. The sulfonylurea is not particularly limited and can beany herbicidal sulfonylurea known in the art or described in the patentliterature. For example, the sulfonylurea may be selected from thesulfonylureas listed in the 16^(th) Edition of “The Pesticide Manual”(ISBN-10: 190139686X). By way of a general structure, the sulfonylureamay be a compound according to Formula (I) as described in WO2007/027863 A2 (E.I. DuPont De Nemours and Company):

wherein J is R¹³SO₂N(CH₃)— or J is selected from the group consisting of

and wherein:

-   -   R is H or CH₃;    -   R¹ is F, Cl, Br, NO₂, C₁-C₄ alkyl, C₁-C₄ haloalkyl, C₃-C₄        cycloalkyl, C₂-C₄ haloalkenyl, C₁-C₄ alkoxy, C₁-C₄ haloalkoxy,        C₂-C₄ alkoxyalkoxy, CO₂R¹⁴, C(O)NR¹⁵R¹⁶, SO2NR¹⁷R¹⁸,        S(O)_(n)R¹⁹, C(O)R²⁰, CH₂CN or L;    -   R² is H, F, Cl, Br, I, CN, CH₃, OCH₃, SCH₃, CF₃ or OCF₂H;    -   R³ is Cl, NO₂, CO₂CH₃, CO₂CH₂CH₃, C(O)CH₃, C(O)CH₂CH₃,        C(O)-cyclopropyl, SO₂N(CH₃)₂, SO₂CH₃, SO₂CH₂CH₃, OCH₃ or        OCH₂CH₃;    -   R⁴ is C₁-C₃ alkyl, C₁-C₂ haloalkyl, C₁-C₂ alkoxy, C₂-C₄        haloalkenyl; F, Cl, Br, NO₂, CO₂R₁₄, C(O)NR₁₅R₁₆, SO₂NR¹⁷R¹⁸,        S(O)nR₁₉, C(O)R₂₀ or L;    -   R⁵ is H, F, Cl, Br or CH₃;    -   R⁶ is C₁-C₃ alkyl optionally substituted with 0-3 F, 0-1 C1 and        0-1 C₃-C₄ alkoxyacetyloxy, or R⁶ is C₁-C₂ alkoxy, C₂-C₄        haloalkenyl, F, Cl, Br, CO₂R¹⁴, C(O)NR¹⁵R¹⁶, SO₂NR¹⁷R¹⁸,        S(O)_(n)R¹⁹, C(O)R²⁰ or L;    -   R⁷ is H, F, Cl, CH₃ or CF₃;    -   R⁸ is H, C₁-C₃ alkyl or pyridyl;    -   R⁹ is C₁-C₃ alkyl, C₁-C₂ alkoxy, F, Cl, Br, NO₂, CO₂R¹⁴,        SO₂NR¹⁷R¹⁸, S(O)_(n)R¹⁹, OCF₂H, C(O)R²⁰, C₂-C₄ haloalkenyl or L;    -   R¹⁰ is H, Cl, F, Br, C₁-C₃ alkyl or C₁-C₂ alkoxy;    -   R¹¹ is H, C₁-C₃ alkyl, C₁-C₂ alkoxy, C₂-C₄ haloalkenyl, F, Cl,        Br, CO₂R¹⁴, C(O)NR¹⁵R¹⁶, SO₂NR¹⁷R¹⁸, S(O)_(n)R¹⁹, C(O)R²⁰ or L;    -   R¹² is halogen, C₁-C₄ alkyl or C₁-C₃ alkylsulfonyl;    -   R¹³ is C₁-C₄ alkyl;    -   R¹⁴ is selected from the group consisting of allyl, propargyl,        oxetan-3-yl and C₁-C₃ alkyl optionally substituted by at least        one member independently selected from halogen, C₁-C₂ alkoxy and        CN;    -   R¹⁵ is H, C₁-C₃ alkyl or C₁-C₂ alkoxy;    -   R¹⁶ is C₁-C₂ alkyl;    -   R¹⁷ is H, C₁-C₃ alkyl, C₁-C₂ alkoxy, allyl or cyclopropyl;    -   R¹⁸ is H or C₁-C₃ alkyl;    -   R¹⁹ is C₁-C₃ alkyl, C₁-C₃ haloalkyl, allyl or propargyl;    -   R²⁰ is C₁-C₄ alkyl, C₁-C₄ haloalkyl or C₃-C₅ cycloalkyl        optionally substituted by halogen;    -   n is 0, 1 or 2;    -   L is

-   -   L¹ is CH₂, NH or O;    -   R²¹ is selected from the group H and C₁-C₃ alkyl;    -   X is selected from the group H, C₁-C₄ alkyl, C₁-C₄ alkoxy, C₁-C₄        haloalkoxy, C₁-C₄ haloalkyl, C₁-C₄ haloalkylthio, C₁-C₄        alkylthio, halogen, C₂-C₅ alkoxyalkyl, C₂-C₅ alkoxyalkoxy,        amino, C₁-C₃ alkylamino and di(C₁-C₃ alkyl)amino;    -   Y is selected from the group H, C₁-C₄ alkyl, C₁-C₄ alkoxy, C₁-C₄        haloalkoxy, C₁-C₄ alkylthio, C₁-C₄ haloalkylthio, C₂-C₅        alkoxyalkyl, C₂-C₅ alkoxyalkoxy, amino, C₁-C₃ alkylamino,        di(C₁-C₃ alkyl)amino, C₃-C₄ alkenyloxy, C₃-C₄ alkynyloxy, C₂-C₅        alkylthioalkyl, C₂-C₅ alkylsulfinylalkyl, C₂-C₅        alkylsulfonylalkyl, C₁-C₄ haloalkyl, C₂-C₄ alkynyl, C₃-C₅        cycloalkyl, azido and cyano; and    -   Z is selected from the group CH and N;    -   provided that (i) when one or both of X and Y is Cl haloalkoxy,        then Z is CH; and (ii) when X is halogen, then Z is CH and Y is        OCH₃, OCH₂CH₃, N(OCH₃)CH₃, NHCH₃, N(CH₃)₂ or CF₂H.

In Formula (I) above, the term “alkyl”, used either alone or in compoundwords such as “alkylthio” or “haloalkyl” includes a straight-chain orbranched alkyl, such as, methyl, ethyl, n-propyl, i-propyl, or thedifferent butyl isomers; “cycloalkyl” includes, for example,cyclopropyl, cyclobutyl and cyclopentyl; “alkenyl” includesstraight-chain or branched alkenes such as ethenyl, 1-propenyl,2-propenyl, and the different butenyl isomers; “alkenyl” also includespolyenes such as 1,2-propadienyl and 2,4-butadienyl; “alkynyl” includesstraight-chain or branched alkynes such as ethynyl, 1-propynyl,2-propynyl and the different butynyl isomers; “alkynyl” can also includemoieties comprised of multiple triple bonds such as 2,5-hexadiynyl;“alkoxy” includes, for example, methoxy, ethoxy, n-propyloxy,isopropyloxy and the different butoxy isomers; “alkoxyalkyl” denotesalkoxy substitution on alkyl and examples include CH₃OCH₂, CH₃OCH₂CH₂,CH₃CH₂OCH₂, CH₃CH₂CH₂CH₂OCH₂ and CH₃CH₂OCH₂CH₂; “alkoxyalkoxy” denotesalkoxy substitution on alkoxy; “alkenyloxy” includes straight-chain orbranched alkenyloxy moieties and examples include H₂C═CHCH₂O,(CH₃)CH═CHCH₂O and CH₂═CHCH₂CH₂O; “alkynyloxy” includes straight-chainor branched alkynyloxy moieties and examples include HC≡CCH₂O andCH₃C≡CCH₂O; “alkylthio” includes branched or straight-chain alkylthiomoieties such as methylthio, ethylthio, and the different propylthioisomers; “alkylthioalkyl” denotes alkylthio substitution on alkyl andexamples include CH₃SCH₂, CH₃SCH₂CH₂, CH₃CH₂SCH₂, CH₃CH₂CH₂CH₂SCH₂ andCH₃CH₂SCH₂CH₂; “alkylsulfinylalkyl” and “alkylsulfonylalkyl” include thecorresponding sulfoxides and sulfones, respectively; other substituentssuch as “alkylamino”, “dialkylamino” are defined analogously.

In Formula (I) above the total number of carbon atoms in a substituentgroup is indicated by the “Ci-Cj” prefix where i and j are numbers from1 to 5. For example, C₁-C₄ alkyl designates methyl through butyl,including the various isomers. As further examples, C₂ alkoxyalkyldesignates CH₃OCH₂; C₃ alkoxyalkyl designates, for example, CH₃CH(OCH₃),CH₃OCH₂CH₂ or CH₃CH₂OCH₂; and C₄ alkoxyalkyl designates the variousisomers of an alkyl group substituted with an alkoxy group containing atotal of four carbon atoms, examples including CH₃CH₂CH₂OCH₂ andCH₃CH₂OCH₂CH₂.

In Formula (I) above the term “halogen”, either alone or in compoundwords such as “haloalkyl”, includes fluorine, chlorine, bromine oriodine. Further, when used in compound words such as “haloalkyl”, saidalkyl may be partially or fully substituted with halogen atoms which maybe the same or different. Examples of “haloalkyl” include F₃C, C1CH₂,CF₃CH₂ and CF₃CCl₂. The terms “haloalkoxy”, “haloalkylthio”, and thelike, are defined analogously to the term “haloalkyl”. Examples of“haloalkoxy” include CF₃O, CCl₃CH₂O, HCF₂CH₂CH₂O and CF₃CH₂O. Examplesof “haloalkylthio” include CCl₃S, CF₃S, CCl₃CH₂S and C1CH₂CH₂CH₂S.

For this invention, preferable sulfonylureas according to Formula (I)include those where X is selected from the group C₁-C₄ alkyl, C₁-C₄alkoxy, C₁-C₄ haloalkoxy, halogen, di(C₁-C₃ alkyl)amino and Y isselected from the group C₁-C₄ alkyl, C₁-C₄ alkoxy, and C₁-C₄ haloalkoxy.More preferably, X is selected from CH₃, OCH₃, Cl, OCHF₂, and N(CH₃)₂and Y is selected from CH₃, OCH₃, OCHF₂ and OCH₂CF₃.

Preferable sulfonylureas according to Formula (I) also include thosewhere J is J-1, R¹ is Cl, CO₂CH₃, CO₂C₂H₅, CH₂CH₂CF₃, or OCH₂CH₂C1, andR² is H; J is J-1, R¹ is CO₂CH₃, and R² is CH₃; J is J-2, R³ is CO₂C₂H₅,OCH₂CH₃, or COC₃-cycloalkyl, L¹ is CH₂, O, or NH, and R² is H; J is J-5,R⁴ is CO₂CH₃, and R⁵ is H; J is J-6, R⁶ is CON(CH₃)₂, SO₂CH₂CH₃, or CF₃,and R⁷ is H; J is J-10, R⁸ is CH₃, R⁹ is CO₂CH₃ and R¹⁰ is Cl.

For the purpose of this invention, the sulfonylurea according to Formula(I), or any of the exemplary sulfonylureas mentioned herein, is to beunderstood as meaning all of the usual use forms in this technicalfield, such as acids, esters, salts and isomers. In this invention thesalt includes acid-addition salts with inorganic or organic acids suchas hydrobromic, hydrochloric, nitric, phosphoric, sulfuric, acetic,butyric, fumaric, lactic, maleic, malonic, oxalic, propionic, salicylic,tartaric, 4-toluenesulfonic or valeric acids. Also included are saltsformed with organic bases (e.g., pyridine, ammonia, or triethylamine) orinorganic bases (e.g., hydrides, hydroxides, or carbonates of sodium,potassium, lithium, calcium, magnesium or barium). Preferred salts ofthe sulfonylureas according to Formula (I), or the exemplarysulfonylureas mentioned herein, include lithium, sodium, potassium,triethylammonium, and quaternary ammonium salts. Preferred esters forthe purpose of this invention are the alkyl esters, in particular theC₁-C₁₀-alkyl esters, such as methyl and ethyl esters.

Exemplary sulfonylureas according to Formula (I) that can be used forthis invention include:

-   amidosulfuron    (N-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N-methylmethanesulfonamide),-   azimsulfuron    (N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]-carbonyl]-1-methyl-4-(2-methyl-2H-tetrazol-5-yl)-1H-pyrazole-5-sulfonamide),-   bensulfuron-methyl (methyl    2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]-sulfonyl]methyl]benzoate),-   chlorimuron-ethyl (ethyl    2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoate),-   chlorsulfuron    (2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide),-   cinosulfuron    (N-[[(4,6-dimethoxy-1,3,5-triazin-2-yl)amino]carbonyl]-2-(2-methoxyethoxy)-benzenesulfonamide),-   cyclosulfamuron    (N-[[[2-(cyclopropylcarbonyl)phenyl]amino]-sulfonyl]-N¹-(4,6-dimethoxypyrimidin-2-yl)urea),-   ethametsulfuron-methyl (methyl    2-[[[[[4-ethoxy-6-(methylamino)-1,3,5-triazin-2-yl]amino]carbonyl]amino]-sulfonyl]benzoate),-   ethoxysulfuron (2-ethoxyphenyl    [[(4,6-dimethoxy-2-pyrimidinyl)-amino]carbonyl]sulfamate),-   flazasulfuron    (N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(trifluoromethyl)-2-pyridinesulfonamide),-   flucetosulfuron    (1-[3-[[[[(4,6-dimethoxy-2-pyrimidinyl)-amino]carbonyl]amino]sulfonyl]-2-pyridinyl]-2-fluoropropyl    methoxyacetate),-   flupyrsulfuron-methyl ((methyl    2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-6-(trifluoromethyl)-3-pyridinecarboxylate),-   foramsulfuron    (2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-4-(formylamino)-N,N-dimethylbenzamide),-   halosulfuron-methyl (methyl    3-chloro-5-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-1-methyl-1H-pyrazole-4-carboxylate),-   imazosulfuron    (2-chloro-N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]-carbonyl]imidazo[1,2-a]pyridine-3-sulfonamide),-   iodosulfuron-methyl (methyl    4-iodo-2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoate),-   iofensulfuron    (2-iodo-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide),-   mesosulfuron-methyl (methyl    2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]-sulfonyl]-4-[[(methylsulfonyl)amino]methyl]benzoate),-   metazosulfuron    (3-chloro-4-(5,6-dihydro-5-methyl-1,4,2-dioxazin-3-yl)-N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-1-methyl-1H-pyrazole-5-sulfonamide),-   metsulfuron-methyl (methyl    2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoate),-   nicosulfuron    (2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamide),-   orthosulfamuron    (2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]amino]-N,N-dimethylbenzamide),-   oxasulfuron (3-oxetanyl    2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoate),-   primisulfuron-methyl (methyl    2-[[[[[4,6-bis(trifluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoate),-   prosulfuron    (N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]-2-(3,3,3-trifluoropropyl)benzenesulfonamide),-   pyrazosulfuron-ethyl (ethyl    5-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-1-methyl-1H-pyrazole-4-carboxylate),-   rimsulfuron    (N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(ethylsulfonyl)-2-pyridinesulfonamide),-   sulfometuron-methyl (methyl    2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-benzoate),-   sulfosulfuron    (N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-2-(ethylsulfonyl)imidazo[1,2-a]pyridine-3-sulfonamide),-   thifensulfuron-methyl (methyl    3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylate),-   triasulfuron    (2-(2-chloroethoxy)-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide),-   tribenuron-methyl (methyl    2-[[[[N-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-N-methylamino]carbonyl]amino]-sulfonyl]benzoate),-   trifloxysulfuron    (N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(2,2,2-trifluoroethoxy)-2-pyridinesulfonamide),-   triflusulfuron-methyl (methyl    2-[[[[[4-dimethylamino)-6-(2,2,2-trifluoroethoxy)-1,3,5-triazin-2-yl]amino]carbonyl]amino]-sulfonyl]-3-methylbenzoate)    and tritosulfuron    (N-[[[4-methoxy-6-(trifluoromethyl)-1,3,5-triazin-2-yl]amino]carbonyl]-2-(trifluoromethyl)benzenesulfonamide).

Other sulfonylureas (e.g. propyrisulfuron:2-chloro-N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-6-propylimidazo[1,2-b]pyridazine-3-sulfonamide)that are mentioned in the art (e.g. WO 2014/018410 A1 (Dow Agrosciences;WO 2012/175899 A1 (Syngenta Ltd.)) can also be used for this invention.

Preferred salts of the sulfonylureas mentioned above include the sodiumsalt thereof and the potassium salt thereof.

The sulfonylurea is preferably comprised in the liquid compositions ofthe invention in an amount of at least 0.1 wt. % based on the totalweight of the liquid composition. More preferably, the sulfonylurea iscomprised in an amount of at least 0.2 wt. %, at least 0.5 wt. %, atleast 0.7 wt. %, at least 1 wt. %, at least 2 wt. %, at least 5 wt. % orat least 7 wt. %. Increasing the amount of sulfonylurea can improve itschemical stability. The sulfonylurea is preferably comprised in thecomposition in an amount of 60 wt. % or less. More preferably, thesulfonylurea is comprised in an amount of 50 wt. % or less, 40 wt. % orless, 30 wt. % or less, 25 wt. % or less, 20 wt. % or less, 10 wt. % orless, 5 wt. % or less, 2 wt. % or less, or 1 wt. % or less. Any of thepreferred lower wt. % limits for the amount of sulfonylurea can becombined with any of the preferred upper wt. % limits to define furthersuitable wt. % ranges for the present invention. As an example, furtherexemplary ranges for the amount of sulfonylurea in the liquidcomposition include 0.1 to 60 wt. %, 1 to 50 wt. %, 2 to 40 wt. %, 5 to30 wt. %, 0.5 to 20 wt. %, 7 to 30 wt. %, 5 to 10 wt. %, 0.2 to 5 wt. %,0.5 to 2 wt. % and 0.5 to 1 wt. %.

When the sulfonylurea is used in a modified form such as its salt, esteror otherwise then the wt. % amounts that are described herein refer tothe weight amount of the modified sulfonylurea. When more than onesulfonylurea is present in the composition (as the salt, ester orotherwise), then the amounts described herein refer to the sum amount ofall the sulfonylureas present in the composition.

When the liquid composition is an oil dispersion of a sulfonylurea, thenit is preferable that the sulfonylurea has a particle size (D50) of atleast 100 nm or more, at least 200 nm or more, at least 500 nm or more,at least 1 μm or more, at least 2 μm or more, or at least 3 μm or moreas a particle size less than this can generate excess heat duringmilling and possibly degrade the sulfonylurea. Preferably, thesulfonylurea has a particle size (D50) of 30 μm or less, 15 μm or less,10 μm or less, 7 μm or less, 5 μm or less, 3 μm or less, 1 μm or less,500 nm or less. Any of the preferred lower limits for the sulfonylureaparticle size can be combined with any of the preferred upper limits todefine further suitable particle size ranges for the present invention.As an example, further exemplary ranges for the particle size (D50) ofthe sulfonylurea include 0.1-30 μm, 0.2-15 μm, 0.5-10 μm, 0.1-0.5 μm,0.2-1 μm, 0.5-3 μm, 1-15 μm, 1-10 μm, 1-7 μm, 2-15 μm, 2-10 μm, 2-7 μm,3-15 μm, 3-10 μm, and 3-7 μm. D50 refers to the volume median particlesize and can be determined by laser light scattering using the methoddescribed in CIPAC MT187.

The liquid composition of the invention may comprise more than onesulfonylurea herbicide compound. The liquid composition may comprise anycombination of sulfonylureas as disclosed herein. For example, theliquid composition may comprise tribenuron-methyl and any othersulfonylurea described herein; the liquid composition may comprisemetsulfuron-methyl and any other sulfonylurea described herein; theliquid composition may comprise nicosulfuron and any other sulfonylureadescribed herein; the liquid composition may comprise iodosulfuron andany other sulfonylurea described herein; or the liquid composition maycomprise halosulfuron-methyl and any other sulfonylurea describedherein. Further exemplary combinations of sulfonylureas for use in thepresent invention include: amidosulfuron and iofensulfuron (optionallyas the sodium salt); nicosulfuron and rimsulfuron; nicosulfuron andthifensulfuron methyl; nicosulfuron and prosulfuron; metsulfuron methyland iodosulfuron methyl (optionally as the sodium salt); metsulfuronmethyl and sulfosulfuron; metsulfuron methyl and thifensulfuron methyl;metsulfuron methyl and bensulfuron methyl; metsulfuron methyl andchlorsulfuron; metsulfuron methyl and chlorimuron ethyl; metsulfuronmethyl and tribenuron-methyl; tribenuron-methyl and bensulfuron-methyl;tribenuron-methyl and thifensulfuron methyl; metsulfuron methyl,tribenuron-methyl and thifensulfuron methyl; tribenuron-methyl andchlorimuron ethyl; tribenuron-methyl and mesosulfuron (optionally asmesosulfuron methyl); tribenuron-methyl and iodosulfuron-methyl(optionally as the sodium salt); iodosulfuron methyl (optionally as thesodium salt) and mesosulfuron; iodosulfuron methyl (optionally as thesodium salt) and mesosulfuron methyl; iodosulfuron methyl (optionally asthe sodium salt) and amidosulfuron; iodosulfuron methyl (optionally asthe sodium salt) and foramsulfuron; iofensulfuron (optionally as thesodium salt) and iodosulfuron; mesosulfuron (and/or as the methyl ester)and iodosulfuron methyl; foramsulfuron and iodosulfuron-methyl(optionally as the sodium salt); rimsulfuron and thifensulfuron;bensulfuron-methyl and thifensulfuron-methyl; thifensulfuron-methyl andchlorimuron-ethyl.

In one aspect of the invention the liquid herbicidal compositioncomprises at least one sulfonylurea that is not a pyridylsulfonylurea.In another aspect of the invention the herbicidal composition does notcomprise a pyridylsulfonylurea. In one further aspect of the inventionthe herbicidal composition does not comprise nicosulfuron.

4.4 Lithium Salt

The composition of the present invention comprises an inorganic ororganic lithium salt. Preferably, the lithium salt has a molecularweight of 250 or less. A molecular weight of 250 or less is preferredbecause it allows more lithium to be introduced to the formulation perunit weight of lithium-containing compound. This can improvesulfonylurea stability with reduced thickening of thesulfonylurea-containing composition itself. In this respect, themolecular weight of the lithium salt is preferably 200 or less, morepreferably 150 or less, and even more preferably 100 or less. The factthat such lithium salts can stabilise a sulfonylurea in a non-aqueoussystem is surprising, more so when the lithium salt is not evendissolved in the composition but suspended therein.

The inorganic lithium salt or the organic lithium salt can have morethan one lithium cation (e.g. two, three or four lithium cations). Thesalt need not be one that is prepared by reacting lithium or alithium-containing compound with the inorganic or organic acid. Itsuffices for the purpose of this invention that the salt is onecontaining one or more lithium cation components and one or morecarboxylic acid anion components.

The organic lithium salt is a salt of lithium and a C₁-C₁₂ organic acid.Preferably, the organic lithium salt is a salt of lithium and a C₁-C₁₀organic acid, more preferably a C₁-C₈ organic acid, and even morepreferably a C₁-C₆ organic acid. Salts of lithium and a C₂-C₁₀ organicacid, C₂-C₈ organic acid, C₄-C₁₀ organic acid, and C₄-C₈ organic acidare also contemplated and preferred. The organic acid may be saturatedor unsaturated; it may be aliphatic, aromatic, or heterocyclic; and/orit may be straight-chained, branched or cyclic. As used herein, the useof terms such as “C₁-C₁₂ organic acid” should be taken as a disclosureof an organic acid having each of the possible number of carbon atoms inthe stated range: in this case, one, two, three, four, five, six, seven,eight, nine, ten, eleven or twelve carbon atoms. For the avoidance ofany doubt, the carboxylic acid groups in the organic acid, as well asthe carbon atoms in any substituent on the organic acid, are alsocounted when assessing the total number of carbon atoms in the organicacid. Lithium salts of small-chain fatty acids (C₁-C₅) or medium-chainfatty acids (C₆-C₁₂) are particularly preferred for the stability thatthey provide to the sulfonylurea but with reduced thickening effect onthe liquid formulation. In this respect, small-chain fatty acids aremost preferred. Preferably, the small chain fatty acid is a C₁-C₄organic acid, more preferably a C₁-C₃ organic acid, and most preferablya C₁- or C₂-organic acid. The organic acid may have one, two, three ormore carboxyl groups. Derivatives of the organic acid are acids whichare mono-, di-, tri- or polysubstituted along the carbon chain or thecyclic structure. Examples of substituents of the organic acids of theinvention include C₁-C₆-alkyl, C₂-C₆-alkenyl, aryl, aralkyl andaralkenyl, hydroxymethyl, C₂-C₆-hydroxyalkyl, C₂-C₆-hydroxyalkenyl,aminomethyl, C₂-C₆-aminoalkyl, cyano, formyl, oxo, thioxo, hydroxyl,mercapto, amino, carboxyl or imino groups. Preferred substituents areC₁-C₆-alkyl (e.g. methyl, ethyl, propyl), hydroxymethyl, hydroxyl, aminoand carboxyl groups. Examples of organic acids that can be used for thelithium organic acid salt include, but are not limited to, formic acid,acetic acid, propionic acid, butyric acid, lactic acid, citric acid,isobutyric acid, valeric acid, isovaleric acid, lauric acid, capricacid, caprylic acid, caproic acid, pivalic acid, oxalic acid, malonicacid, salicylic acid, tartaric acid, succinic acid, glutaric acid,glyceric acid, glyoxylic acid, adipic acid, pimelic acid, suberic acid,azelaic acid, sebacic acid, propiolic acid, crotonic acid, isocrotonicacid, elaidic acid, maleic acid, fumaric acid, muconic acid, citraconicacid, mesaconic acid, camphoric acid, phthalic acid (o-, m-, or p-),naphthoic acid, benzoic acid, toluic acid, hydratropic acid, atropicacid, cinnamic acid, isonicotinic acid, nicotinic acid, bicarbamic acid,4,4′-dicyano-6,6′-binicotinic acid, 8-carbamoyl-octanoic acid,1,2,4-pentanetricarboxylic acid, 2-pyrrolecarboxylic acid,malonaldehydic acid, 4-hydroxyphthalamic acid, 1-pyrazolecarboxylicacid, gallic acid or propanetricarboxylic acid. It is particularlypreferred to use the lithium salt of formic acid, acetic acid, propionicacid, fumaric acid, salicylic acid, citric acid, lactic acid, oxalicacid and/or tartaric acid, with formic acid, acetic acid, citric acidand oxalic acid being most preferred.

The inorganic lithium salt is a salt of lithium and an inorganic acid.Exemplary inorganic acids include, but are not limited to, HAlO₂,HAl(OH)₄, H₃AsO₄, HAsO₂, H₃AsO₃, H₃BO₃, (HBO₂)_(n), H₂B₄O₇, HBO₃, HBrO₃,HBrO₂, HBrO, HBrO₄, H₂CO₃, H₄CO₄, H₂C₂O₆, H₂CO₄ (or H₂CO₃H₂O₂), HClO₃,HClO₄, HClO₂, HClO, HONC, HOCN, HNCO, HIO₃, HIO (or IOH, HIO₄), H₅IO₆,H₄I₂O₉, HNO₃, HNO₂, H₃PO₄, H₅PO₅, HPO₃, H₃PO₃, H₄P₂O₅, HPO₂, H₃PO₂,H₄P₂O₆, H₄P₂O₇, H₂SO₄, H₂SO₃, H₂S₂O₃, H₂S₂O₇, H₂SO₂, H₂S_(x)O₆ (x=2-6),H₆SO₆, H₂S₂O₄, H₂SO₅, H₂S₂O₈, HSO₃Cl, HSO₃F, H₂SiO₃ (or SiO₂.H₂O),H₄SiO₄, H₂Si₂O₅ (or SiO₂.H₂O), H₄Si₃O₈, H₆Si₂O₇ (or 2SiO₂.3H₂O),H[CHB₁₁Cl₁₁], H₂S, H₂CS₄, H₂CS₃, HCN, HSeCN, HSCN, HBF₄, H₂SiF₆, HPF₆,HF, HCl, HBr, and HI. Preferably, the inorganic lithium salt is acarbonate, a phosphate, a sulphate, or a halide (preferably, F or Cl).

Lithium salts that are envisioned for use in the present inventioninclude, by way of example, the following compounds: lithium acetate,lithium acetate dihydrate, lithium acetoacetate, lithiumacetylacetonate, lithium iodoacetate, lithium 2-hydroxybutanoate,lithium molybdate, lithium titanate, lithium manganese oxide, lithiummanganese dioxide, lithium iron phosphate, lithium zirconate, lithiumiron oxide, lithium D-gluconate, lithium pentaborate, lithium bromide,lithium iodide, lithium chloride, lithium calcium chloride, lithiumhydrogen carbonate, lithium carbonate, lithium citrate, lithiumhydroxide, lithium manganate, lithium methionate, lithium oxalate,lithium monoxide, lithium oxide, lithium mono-orthophosphate, lithiumorthophosphite, lithium silicate, lithium disilicate, lithiummetasilicate, lithium sodium carbonate, lithium salt(E,E)-2,4-hexadienoic acid, dilithium fluorophosphate, dilithiumfluorophosphite, lithium metaphosphate, trilithium phosphate, trilithiumphosphite, lithium propanoate, lithium butanoate, lithium pentanoate,lithium hexanoate, lithium heptanoate, lithium octanoate, lithiumnonanoate, lithium decanoate, lithium formate, lithium phosphate(dibasic, monobasic, tribasic), lithium salicylate, lithium-sodiumphosphate, lithium sulfite, lithium sulfate, dilithium sulfite, lithiumthiocyanate, lithium fluorosilicate, oxalic acid dilithium salt, lithiumbetahydropyruvic acid, lithium benzoate, cyclohexane acid lithium salt,lithium fluoride, lithium aluminate, lithium tetrafluoroborate, lithiumthioacetate, L-glutamic acid monolithium salt, fumaric acid lithiumsalt, lithium trimethylsilanolate, lithium hydrogensulfate, lithiumpyrophosphate, lithium dihydrogenphosphate, monolithium L-aspartic acid,lithium bromate, lithium periodate, monlithium salt D-saccharic acid,D-asparatic lithium salt, (R)-alpha-hyroxymethylaspartic acid lithiumsalt, lithium salt ethyl malonate, lithium salt lactic acid, dilithiumthiosulfate, lithium dichloroacetate, lithium dimethylacetate, lithiumdiethylacetate, lithium dipropyl-acetate, lithium metaborate, lithiumlaurate, lithium caprate, lithium caprylate, lithium caproate, lithiumtetraborate, lithium difluoride, lithium bismuthate, lithium borate,lithium chlorite, lithium hexametaphosphate, lithium hydrogenphosphite,lithium hydrogenselenite, lithium hydrogensulfite, lithium hydrosulfite,lithium hypochlorite, lithium polyphosphate, lithium polyphosphite,lithium propionate, lithium pyrophosphate, lithium selenate, lithiumthiosulfate, lithium thiosulfide, and lithium thiosulfite. It is to beunderstood that the above list includes analogues, homologues, isomers,enantiomers, hydrates and derivatives thereof.

Both the anhydrous and hydrated forms of the lithium salts can be usedfor the purpose of this invention but the anhydrous form is mostpreferred in view of improving chemical stability of the sulfonylurea.

Surprisingly, lithium formate, lithium acetate, lithium citrate, lithiumbenzoate, lithium octanoate, lithium salicylate, lithium carbonate,lithium phosphate, lithium chloride and lithium sulphate provide for asulfonylurea with superior chemical stability than many of the othersalts mentioned herein, particularly with respect to those sulfonylureasthat are more prone to hydrolysis in liquid compositions. For example,iodosulfuron-methyl, halosulfuron-methyl, metsulfuron-methyl,pyrazosulfuron-ethyl, and amidosulfuron were found to have excellentchemical stability in the presence of lithium acetate. As anotherexample, iodosulfuron-methyl was found to have excellent chemicalstability in the presence of lithium acetate, lithium formate, lithiumbenzoate, lithium octanoate, lithium salicylate, lithium citrate,lithium carbonate, lithium phosphate, lithium chloride and lithiumsulphate.

Superior chemical stability has also been observed where:

-   -   the at least one lithium salt is lithium acetate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof, halosulfuron-methyl or salts thereof,        metsulfuron-methyl or salts thereof, pyrazosulfuron-ethyl or        salts thereof or amidosulfuron or salts thereof; or    -   the at least one lithium salt is lithium carbonate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof, or halosulfuron-methyl or salts thereof; or    -   the at least one lithium salt is lithium formate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof; or    -   the at least one lithium salt is lithium phosphate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof; or    -   the at least one lithium salt is lithium chloride and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof; or    -   the at least one lithium salt is lithium sulphate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof;    -   the at least one lithium salt is lithium benzoate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof;    -   the at least one lithium salt is lithium octanoate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof, halosulfuron-methyl or salts thereof,        pyrazosulfuron-ethyl or salts thereof, amidosulfuron or salts        thereof, or foramsulfuron or salts thereof, or chlorsulfuron or        salts thereof; or    -   the at least one lithium salt is lithium citrate and the        sulfonylurea is selected from iodosulfuron-methyl or salts        thereof.

Accordingly, the invention also relates to formulations, as describedherein, comprising the above preferred combination of salt andsulfonylurea. The invention also relates to the use of a lithium salt toimprove chemical stabilisation of a sulfonylurea herbicide, wherein theat least one lithium salt is lithium acetate and the sulfonylurea isselected from iodosulfuron-methyl or salts thereof, halosulfuron-methylor salts thereof, metsulfuron-methyl or salts thereof,pyrazosulfuron-ethyl or salts thereof or amidosulfuron or salts thereof;or the at least one lithium salt is lithium carbonate and thesulfonylurea is selected from iodosulfuron-methyl or salts thereof, orhalosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium formate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium phosphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium chloride and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium sulphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium citrate or lithium benzoate and the sulfonylurea is selectedfrom iodosulfuron-methyl or salts thereof; or the at least one lithiumsalt is lithium octanoate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof, halosulfuron-methyl or saltsthereof, pyrazosulfuron-ethyl or salts thereof, amidosulfuron or saltsthereof, or foramsulfuron or salts thereof, or chlorsulfuron or saltsthereof.

In terms of improving chemical stability of the sulfonylurea, thelithium salt is preferably comprised in the liquid composition of theinvention in an amount of at least 0.01 wt. % based on the total weightof the liquid composition. More preferably, the lithium salt iscomprised in an amount of at least 0.03 wt. %, at least 0.05 wt. %, atleast 0.1 wt. %, at least 0.2 wt. %, at least 0.5 wt. %, at least 1 wt.%, at least 2 wt. %. The lithium salt is preferably comprised in thecomposition in an amount of 30 wt. % or less to reduce physicalstability problems of the formulation and to reduce interference withthe function of any surfactants that are optionally present. Morepreferably, the lithium salt is comprised in an amount of 25 wt. % orless, 20 wt. % or less, 15 wt. % or less, 10 wt. % or less, 8 wt. % orless, 6 wt. % or less, 5 wt. % or less, 2 wt. % or less, 1 wt. % orless, or 0.7 wt. % or less. Any of the preferred lower wt. % limits forthe amount of lithium salt can be combined with any of the preferredupper wt. % limits to define further suitable wt. % ranges for thepresent invention. As an example, further exemplary ranges for theamount of lithium salt in the liquid composition include 0.01 to 30 wt.%, 0.1 to 25 wt. %, 1 to 20 wt. %, 1 to 10 wt. %, 0.5 to 10 wt. %, 1 to5 wt. %, 0.5 to 5 wt. %, 0.1 to 2 wt. %, 0.2 to 2 wt. %, 0.2 to 1 wt. %,and 0.2 to 0.7 wt. %.

The weight ranges above refer to the total amount of inorganic lithiumsalt and organic lithium salt wherein the organic lithium salt isselected from the C₁-C₁₂ organic carboxylic acid salts of lithium. Theweight ranges above do not refer to the lithium salt of a sulfonylureaor lithium salt of a non-sulfonylurea herbicide should these be presentin the composition. When more than one inorganic or organic lithium saltas described herein is present in the composition (e.g. lithium acetateand lithium carbonate), then the amounts described herein refer to thesum amount of all the inorganic and organic lithium salts that arepresent in the composition, wherein the organic lithium salt refers tothe C₁-C₁₂ organic carboxylic acid salts of lithium.

In terms of improving chemical stability, it is preferable that theweight ratio of the lithium salt to sulfonylurea is 0.1 or greater.Preferably, the weight ratio of the lithium salt to sulfonylurea is 0.2or greater, 0.3 or greater, 0.5 or greater, 0.7 or greater, or 1 orgreater. The weight ratio of the lithium salt to sulfonylurea ispreferably 5 or less, 4 or less, 3 or less, 2 or less, or 1 or less. Thepreferred weight ratios refer to the total amount of the inorganiclithium salt and C₁-C₁₂ organic acid lithium salt with respect to thetotal amount of sulfonylurea compounds in the liquid composition. Any ofthe preferred lower weight ratio limits can be combined with any of thepreferred upper weight ratio limits to define further suitable weightratio ranges for the present invention. As an example, further exemplaryranges for the weight ratio of the lithium salt to sulfonylurea include0.1 to 5, 0.2 to 4, 0.3 to 3, 0.3 to 1, 0.5 to 2, 0.7 to 2, 0.1 to 2, 1to 2 and 1 to 5.

In one embodiment of the invention the liquid herbicidal compositioncomprises:

-   -   a non-aqueous solvent system;    -   at least one sulfonylurea herbicide, wherein the total amount of        sulfonylurea compounds is 1 to 50 wt. % of the composition; and    -   at least one inorganic or C₁-C₁₂ organic lithium salt, wherein        the total amount of said lithium salt is 0.1 to 20 wt. %;    -   with the proviso that the weight ratio of said lithium salt to        sulfonylurea is in the range of from 0.1 to 10.

In a preferred embodiment of the invention the total amount ofsulfonylurea compounds is 2 to 20 wt. %, the total amount of inorganicor C₁-C₁₂ organic lithium salt is 1 to 20 wt. %, and the weight ratio ofsaid lithium salt to sulfonylurea is in the range of from 0.1 to 10.

In a preferred embodiment of the invention the total amount ofsulfonylurea compounds is 2 to 20 wt. %, the total amount of inorganicor C₁-C₁₂ organic lithium salt is 1 to 20 wt. %, and the weight ratio ofsaid lithium salt to sulfonylurea is in the range of from 0.5 to 2.5,preferably 0.7 to 2.0.

In any of the embodiments above, the lithium salt can be a C₁-C₃ organiccarboxylic acid salt.

In any of the embodiments above, the liquid herbicidal composition maycomprise iodosulfuron methyl (optionally as the sodium salt),halosulfuron-methyl, metsulfuron-methyl, pyrazosulfuron-ethyl oramidosulfuron.

In any of the embodiments above, the liquid herbicidal composition maycontain only one sulfonylurea selected from iodosulfuron methyl(optionally as the sodium salt), halosulfuron-methyl,metsulfuron-methyl, pyrazosulfuron-ethyl and amidosulfuron.

In any of the embodiments above, if the salt includes lithium acetate,lithium formate, lithium carbonate, lithium chloride, lithium sulphate,lithium octanoate, lithium benzoate or lithium citrate, then the weightratio of these salts (individually, or collectively if more than one ispresent) to the total amount of sulfonylurea is preferably in the rangeof from 0.1 to 10, more preferably in the range of from 0.5 to 2.

Maintaining the particle size of the lithium salt within a defined rangemay provide benefits in terms of improved chemical stability of thesulfonylurea. The particle size (D50) of the lithium salt is preferablyat least 100 nm or more, at least 200 nm or more, at least 500 nm ormore, at least 1 μm or more, at least 1.5 μm or more, or at least 2 μmor more. The particle size (D50) of the lithium salt is preferably 30 μmor less, 15 μm or less, 10 μm or less, 5 μm or less, 3 μm or less, 1 μmor less, or 500 nm or less to improve chemical stability of thesulfonylurea in the composition. Any of the preferred lower limits forthe lithium salt particle size can be combined with any of the preferredupper limits to define further suitable salt particle size ranges forthe present invention. As an example, further exemplary ranges for theparticle size of the lithium salt include 0.1-30 μm, 0.2-15 μm, 0.5-10μm, 0.1-0.5 μm, 0.2-1 μm, 0.5-3 μm, 1-15 μm, 1-10 μm, 1-5 μm, 1-3 μm,1.5-15 μm, 2-15 μm, 2-10 μm, 2-5 μm, and 2-3 μm. D50 refers to thevolume median particle size and can be determined by laser lightscattering using the method described in CIPAC MT187.

4.5 Non-Aqueous Solvent

The composition of the present invention comprises a non-aqueous solventsystem. The term “non-aqueous solvent system” means that one or moresolvents other than water (e.g. organic solvents) are used as the liquidcarrier in the liquid composition. This does not mean to say that thesolvent system must necessarily be completely free of water. Traceamounts of water may be present in the components that are used toprepare the non-aqueous solvent system. For instance, trace amounts ofwater may be introduced into the solvent system by organic solvents,surfactants or salts that are used to prepare the liquid herbicidalcomposition. While the term “non-aqueous solvent system” is clear inthis technical field (e.g. ODs, ECs and SLs employ a non-aqueous solventsystem), for the avoidance of any doubt the term can be taken to meanthat the liquid composition comprises water in an amount of 5 wt. % orless of the composition, preferably 3 wt. % or less, more preferably 2wt. % and most preferably 1 wt. % or less.

The sulfonylurea and lithium salt are dissolved, dispersed, suspended orotherwise contained in the non-aqueous solvent system. Typical solventsare described in Marsden, Solvents Guide, 2nd Ed., Interscience, NewYork, 1950. The non-aqueous solvent system preferably contains one ormore aprotic organic solvents as the major constituent of the solventsystem. When the amount of aprotic solvent in the solvent system is 50wt. % or more, the ability of the lithium salt to chemically stabilisethe sulfonylurea is greatly improved. Preferably, the one or moreaprotic solvents make up 60 wt. % or more, 70 wt. % or more, 80 wt. % ormore and most preferably 90 wt. % or more of the solvent system.Suitable aprotic organic solvents for use in the present inventioninclude, for example, those listed under “Component (C)” in US2005/0113254 (Bayer CropScience GmbH):

(1) hydrocarbons, which may be unsubstituted or substituted, for example

-   -   (1a) aromatic hydrocarbons, for example mono- or        polyalkyl-substituted benzenes, such as toluene, xylenes,        mesitylene, ethylbenzene, or mono- or polyalkyl-substituted        naphthalenes, such as 1-methylnaphthalene, 2-methylnaphthalene        or dimethylnaphthalene, or other benzene-derived aromatic        hydrocarbons, such as indane or Tetralin®, or mixtures thereof,    -   (1b) aliphatic hydrocarbons, for example straight-chain or        branched aliphatics, for example of the formula C_(n)H_(2n+2),        such as pentane, hexane, octane, 2-methylbutane or        2,2,4-trimethylpentane, or cyclic, optionally alkyl-substituted        aliphatics, such as cyclohexane or methylcyclopentane, or        mixtures thereof, such as solvents of the Exxsol® D series,        Isopar® series or Bayol® series, for example Bayol® 82        (ExxonMobil Chemicals), or the Isane® IP series or Hydroseal® G        series (TotalFinaElf), as well as straight-chain, branched or        cyclic unsaturated aliphatics including terpenes such as        turpentine and its constituents (e.g. pinene, camphene) as well        as compounds derivable therefrom such as isobornyl acetate        (exo-1,7,7-trimethylbicyclo[2.2.1]hept-2-yl acetate),    -   (1c) mixtures of aromatic and aliphatic hydrocarbons, such as        solvents of the Solvesso® series, for example Solvesso® 100,        Solvesso® 150 or Solvesso® 200 (ExxonMobil Chemicals), of the        Solvarex®/Solvaro® series (TotalFinaElf) or the Caromax® series,        for example Caromax® 28 (Petrochem Carless), or    -   (1d) halogenated hydrocarbons, such as halogenated aromatic and        aliphatic hydrocarbons, such as chlorobenzene or methylene        chloride;        (2) aprotic polar solvents, such as ethers, esters of        C₁-C₉-alkanoic acids which may be mono-, di- or polyfunctional,        such as their mono-, di- or triesters, for example with        C₁-C₁₈-alkyl alcohols, ketones with a low tendency to        tautomerize, phosphoric acid esters, amides, nitriles or        sulfones, for example tris-2-ethylhexyl phosphate, diisobutyl        adipate, Rhodiasolv® RPDE (Rhodia), cyclohexanone, Jeffsol® PC        (Huntsman), γ-butyrolactone, pyrrolidone-based solvents such as        N-methylpyrrolidone or N-butylpyrrolidone, dimethyl sulfoxide,        acetonitrile, tributylphosphatam or the Hostarex® PO series        (Clariant);        (3) fatty acid esters, for example of natural origin, for        example natural oils, such as animal oils or vegetable oils, or        of synthetic origin, for example the Edenor® series, for example        Edenor® MEPa or Edenor® MESU, or the Agnique® ME series or        Agnique® AE series (Cognis), the Salim® ME series (Salim), the        Radia® series, for example Radia® 30167 (ICI), the Prilube®        series, for example Prilube® 1530 (Petrofina), the Stepan® C        series (Stepan) or the Witconol® 23 series (Witco). The fatty        acid esters are preferably esters of C₁₀-C₂₂—, with preference        C₁₂-C₂₀-fatty acids. The C₁₀-C₂₂-fatty acid esters are, for        example, esters of unsaturated or saturated C₁₀-C₂₂-fatty acids,        in particular those having an even number of carbon atoms, for        example erucic acid, lauric acid, palmitic acid, and in        particular C₁₈-fatty acids, such as stearic acid, oleic acid,        linoleic acid or linolenic acid.

Examples of fatty acid esters such as C₁₀-C₂₂-fatty acid esters areglycerol and glycol esters of fatty acids such as C₁₀-C₂₂-fatty acids,or transesterification products thereof, for example fatty acid alkylesters such as C₁₀-C₂₂-fatty acid C₁-C₂₀-alkyl esters, which can beobtained, for example, by transesterification of the abovementionedglycerol or glycol fatty acid esters such as C₁₀-C₂₂-fatty acid esterswith C₁-C₂₀-alcohols (for example methanol, ethanol, propanol orbutanol). Preferred fatty acid alkyl esters such as C₁₀-C₂₂-fatty acidC₁-C₂₀-alkyl esters are methyl esters, ethyl esters, propyl esters,butyl esters, 2-ethylhexyl esters and dodecyl esters. Preferred glycoland glycerol fatty acid esters such as C₁₀-C₂₂-fatty acid esters are theuniform or mixed glycol esters and glycerol esters of C₁₀-C₂₂-fattyacids, in particular of such fatty acids having an even number of carbonatoms, for example erucic acid, lauric acid, palmitic acid and inparticular C₁₈-fatty acids such as stearic acid, oleic acid, linoleicacid or linolenic acid.

Animal oils and vegetable oils are generally known and commerciallyavailable. For the purpose of the present invention, the term “animaloils” is to be understood as meaning oils of animal origin such as whaleoil, cod-liver oil, musk oil or mink oil, and the term “vegetable oils”is to be understood as meaning oils of oleaginous plant species, such assoybean oil, rapeseed oil, corn oil, sunflower oil, cottonseed oil,linseed oil, coconut oil, palm oil, thistle oil, walnut oil, arachisoil, olive oil or castor oil, in particular rapeseed oil, where thevegetable oils also include their transesterification products, forexample alkyl esters, such as rapeseed oil methyl ester or rapeseed oilethyl ester.

The vegetable oils are preferably esters of C₁₀-C₂₂-fatty acids,preferably C₁₂-C₂₀-fatty acids. The C₁₀-C₂₂-fatty acid esters are, forexample, esters of unsaturated or saturated C₁₀-C₂₂-fatty acids having,in particular, an even number of carbon atoms, for example erucic acid,lauric acid, palmitic acid and in particular C₁₈-fatty acids such asstearic acid, oleic acid, linoleic acid or linolenic acid. Examples ofvegetable oils are C₁₀-C₂₂-fatty acid esters of glycerol or glycol withC₁₀-C₂₂-fatty acids, or C₁₀-C₂₂-fatty acid C₁-C₂₀-alkyl esters which canbe obtained, for example, by transesterification of the glycerol orglycol C₁₀-C₂₂-fatty acid esters mentioned above with C₁-C₂₀-alcohols(for example methanol, ethanol, propanol or butanol). The vegetable oilscan be contained in the mixtures for example in the form of commerciallyavailable vegetable oils, in particular rapeseed oils, such as rapeseedoil methyl ester, for example Phytorob® B (Novance, France), Edenor®MESU and the Agnique® ME series (Cognis, Germany) the Radia® series(ICI), the Prilube® series (Petrofina), or biodiesel or in the form ofcommercially available plant-oil-containing formulation additives, inparticular those based on rapeseed oils, such as rapeseed oil methylesters, for example Hasten® (Victoria Chemical Company, Australia),Actirob® B (Novance, France), Rako-Binol® (Bayer AG, Germany), Renol®(Stefes, Germany) or Mero® (Stefes, Germany).

Examples of synthetic acid esters are, for example, those derived fromfatty acids having an odd number of carbon atoms, such as C₁₁-C₂₁-fattyacid esters.

Preferred organic solvents are hydrocarbons, in particular aromatichydrocarbons and/or aliphatic hydrocarbons and fatty acid esters, suchas vegetable oils, such as triglycerides of fatty acids having 10 to 22carbon atoms, which may be saturated or else unsaturated, straight-chainor branched and which may or may not carry further functional groups,such as corn oil, rapeseed oil, sunflower oil, cottonseed oil, linseedoil, soybean oil, coconut oil, palm oil, thistle oil or castor oil, andtheir trans-esterification products, such as fatty acid alkyl esters,and mixtures thereof.

Preferred solvents for use in the present invention include: linear orbranched C6 to C30 paraffin oils, for example hexane, heptane, octane,nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane,hexadecane, their mixtures, or mixtures thereof with higher boilinghomologs, such as hepta-, octa-, nona-decane, eicosane, heneicosane,docosane, tricosane, tetracosane, pentacosane, and the branched chainisomers thereof; aromatic or cycloaliphatic solvents, which may beunsubstituted or substituted, C7- to C18-hydrocarbon compounds such asmono- or polyalkyl-substituted benzenes, or mono- orpolyalkyl-substituted naphthalenes; vegetable oils such as liquidtriglycerides, for example olive oil, kapok oil, castor oil, papaya oil,camellia oil, palm oil, sesame oil, corn oil, rice bran oil, peanut oil,walnut oil, coconut oil, cotton seed oil, soybean oil, rapeseed oil,linseed oil, tung oil, sunflower oil, safflower oil, or alsotransesterification products thereof, e.g. alkyl esters, such asrapeseed oil methyl ester or rapeseed oil ethyl ester; animal oil, suchas whale oil, cod-liver oil, or mink oil; liquid esters of C1 to C12monoalcohols or polyols, for example butanol, n-octanol, i-octanol,dodecanol, cyclopentanol, cyclohexanol, cyclooctanol, ethylene glycol,propylene glycol or benzyl alcohol, with C2 to C10 carboxylic orpolycarboxylic acids, such as caproic acid, capric acid, caprylic acid,pelargonic acid, succinic acid and glutaric acid; or with aromaticcarboxylic acids such as benzoic acid, toluic acid, salicylic acid andphthalic acid. Esters which can be used in the composition of theinvention are thus, for example, benzyl acetate, caproic acid ethylester, isobornyl acetate, pelargonic acid ethyl ester, benzoic acidmethyl or ethyl ester, salicylic acid methyl, propyl, or butyl ester,diesters of phthalic acid with saturated aliphatic or alicyclic C1 toC12 alcohols, such as phthalic acid dimethyl ester, dibutyl ester,diisooctyl ester; liquid amides of C1-C3 amines, alkylamines oralkanolamines with C6 to C18 carboxylic acids; or mixtures thereof.

The non-aqueous solvent system is present in an amount such that it canact as a liquid carrier for the other components that are present in thecomposition. Preferably, the non-aqueous solvent system comprises anorganic solvent in an amount of at least 5 wt. % based on the weight ofthe composition. A low amount of organic solvent is possible when othercomponents in the composition are also liquids (e.g. liquid herbicideand/or liquid emulsifier). More preferably, the non-aqueous solventsystem comprises an organic solvent in an amount of at least 10 wt. %,at least 15 wt. %, at least 20 wt %, at least 25 wt %, at least 30 wt.%, or at least 40 wt. % of the composition. Preferably the non-aqueoussolvent system comprises an organic solvent in an amount of 95 wt. % orless of the composition. More preferably the non-aqueous solvent systemcomprises an organic solvent in an amount of 90 wt. % or less, 85 wt. %or less, 80 wt. % or less, 75 wt. % or less, or 60 wt. % or less of thecomposition. Any of the disclosed wt. % lower limits for the amount ofthe organic solvent in the non-aqueous solvent system can be combinedwith any of the disclosed wt. % upper limits to define further suitablewt. % ranges for the purpose of this invention. As an example, exemplaryranges for the amount of the organic solvent in the composition include5 to 95 wt. %, 10 to 90 wt. %, 20 to 80 wt. %, 30 to 60 wt. %, 40 to 60wt. %, 10 to 75 wt. % and 20 to 60 wt. %.

When more than one organic solvent is present in the composition thenthe amounts described herein refer to the sum amount of all the organicsolvents present in the composition.

The total amount of protic organic solvent such as alcohols, amines andcarboxylic acids is preferably kept to 20 wt. % or less based on theweight of the liquid composition. More preferably, the total amount ofprotic organic solvent is 15 wt. % or less, 10 wt. % or less, 5 wt. % orless, 2 wt. % or less, or 1 wt. % or less of the composition. When morethan one protic solvent is present in the composition then the amountsdescribed herein refer to the sum amount of all the protic solventspresent in the composition.

4.6 Additional Active Agents 4.6.1 Non-Sulfonylurea Herbicides

The composition of the present invention may comprise one or moreherbicides in addition to the sulfonylurea herbicide(s). Theseadditional non-sulfonylurea herbicides may be liquids, waxy solids orpowders and may be dissolved, dispersed, suspended or otherwisecontained in the composition. The additional herbicidal compound is notparticularly limited and can be any herbicidal compound known in theart. For example, the compound may be selected from the herbicidalcompounds listed in the 16^(th) Edition of “The Pesticide Manual”(ISBN-10: 190139686X) and the literature cited therein. Exemplaryadditional herbicidal compounds include:

2,4-D (e.g. ester or amine), 2,4-DB, 2,3,6-TBA, acetochlor, acifluorfen,acifluorfen-sodium, aclonifen, alachlor, alloxydim, alloxydim-sodium,ametryn, amicarbazone, aminopyralid, amitrole, anilofos, asulam,atrazine, azafenidin, beflubutamid, benazolin,-benazolin-ethyl,benfuresate, bentazone, benzfendizone, benzobicyclon, benzofenap,bifenox, bilanafos, bispyribac-sodium, bromacil, bromobutide,bromofenoxim, bromoxynil, butachlor, butafenacil, butenachlor, butralin,butroxydim, butylate, cafenstrole, carbetamide, carfentrazone-ethyl,chlomethoxyfen, chloridazon, chlornitrofen, chlorotoluron,cinidon-ethyl, cinmethylin, clefoxydim, clethodim, clodinafop-propargyl,clomazone, clomeprop, clopyralid, cloransulam-ethyl, cumyluron,cyanazine, cycloxydim, cyhalofop-butyl, daimuron, dazomet, desmedipham,dicamba, dichlobenil, dichlorprop, dichlorprop-P, diclofop-methyl,diclosulam, difenzoquat, diflufenican, diflufenzopyr, dikegulac-sodium,dimefuron, dimepiperate, dimethachlor, dimethametryn, dimethenamid,diquat-dibromide, dithiopyr, diuron, dymron, EPTC, esprocarb,ethalfluralin, ethofumesate, ethoxyfen, etobenzanid, fenoxaprop-ethyl,fenoxaprop-P-ethyl, fentrazamide, flamprop-M-isopropyl,flamprop-M-methyl, florasulam, fluazifop, fluazifop-butyl, fluazolate,flucarbazone-sodium, fluchloralin, flufenacet, flufenpyr, flumetsulam,flumiclorac-pentyl, flumioxazin, fluometuron, fluorochloridone,fluoroglycofen-ethyl, flupoxam, fluridone, fluroxypyr,fluroxypyr-butoxypropyl, fluroxypyr-meptyl, flurprimidol, flurtamone,fluthiacet-methyl, fomesafen, glufosinate, glufosinate-ammonium,glyphosate, haloxyfop, haloxyfop-ethoxyethyl, haloxyfop-methyl,haloxyfop-P-methyl, hexazinone, imazamethabenz-methyl, imazamox,imazapic, imazapyr, imazaquin, imazethapyr, indanofan, ioxynil,isoproturon, isouron, isoxaben, isoxachlortole, isoxaflutole,ketospiradox, lactofen, lenacil, linuron, MCPA, MCPB, mecoprop,mecoprop-P, mefenacet, mesotrione, metamifop, metamitron, metazachlor,methabenzthiazuron, methyldymron, metobromuron, metolachlor, metosulam,metoxuron, metribuzin, molinate, monolinuron, naproanilide, napropamide,neburon, norflurazon, orbencarb, oryzalin, oxadiargyl, oxadiazon,oxaziclomefone, oxyfluorfen, paraquat, pelargonic acid, pendimethalin,pendralin, penoxsulam, pentoxazone, pethoxamid, phenmedipham, picloram,picolinafen, pinoxaden, piperophos, pretilachlor, profluazol,profoxydim, prometryn, propachlor, propanil, propaquizafop,propisochlor, propoxycarbazone-sodium, propyzamide, prosulfocarb,pyraclonil, pyraflufen-ethyl, pyrazolate, pyrazoxyfen, pyribenzoxim,pyributicarb, pyridafol, pyridate, pyriftalid, pyriminobac-methyl,pyrithiobac-sodium, quinclorac, quinmerac, quinoclamine,quizalofop-ethyl, quizalofop-P-ethyl, quizalofop-P-tefuryl, sethoxydim,simazine, simetryn, S-metolachlor, sulcotrione, sulfentrazone,sulfosate, tebuthiuron, tepraloxydim, terbuthylazine, terbutryn,thenylchlor, thiazopyr, thiobencarb, tiocarbazil, tralkoxydim,triallate, triaziflam, triclopyr, tridiphane, and trifluralin.

The additional non-sulfonylurea herbicide is preferably comprised in theliquid composition of the invention in an amount of at least 0.1 wt. %.More preferably, the non-sulfonylurea herbicide is comprised in anamount of at least 0.2 wt. %, at least 0.5 wt. %, at least 0.7 wt. %, atleast 1 wt. %, at least 2 wt. %, at least 5 wt. %, at least 10 wt. %, atleast 15 wt. %, at least 20 wt. % or at least 25 wt. %. Thenon-sulfonylurea herbicide is preferably comprised in the composition anamount of 95 wt. % or less. A large amount of non-sulfonylurea herbicideis possible when the non-sulfonylurea herbicide is itself a liquid. Morepreferably, the non-sulfonylurea herbicide is comprised in an amount of60 wt. % or less, 50 wt. % or less, 40 wt. % or less, 35 wt. % or less,30 wt. % or less or 25 wt. % or less. Any of the disclosed wt. % lowerlimits for the amount of non-sulfonylurea herbicide can be combined withany of the disclosed wt. % upper limits to define further suitable wt. %ranges for the purposes of this invention. As an example, furtherexemplary ranges for the amount of non-sulfonylurea herbicide in theliquid composition include 0.1 to 95 wt. %, 1 to 60 wt. %, 2 to 50 wt.%, 5 to 40 wt. %, 10 to 30 wt. %, 15 to 25 wt. %, 25 to 35 wt. % and 10to 50 wt. %.

When a salt or derivative (ester, etc.) of the non-sulfonylureaherbicide is employed for the purposes of this invention then the wt. %amounts that are described herein refer to the weight of the salt orderivative. When more than one non-sulfonylurea herbicide is present inthe composition (as a salt, derivative or otherwise), then the amountsdescribed herein refer to the sum amount of all of the non-sulfonylureaherbicides present in the composition.

In the present invention one or more of the non-sulfonylurea herbicidesmay be partially or wholly encapsulated (e.g. microcapsules) such as isdescribed in WO 2008/061721 A2 (GAT Microencapsulation AG). In such casethe wt. % amounts that are described herein refer to the weight of thenon-sulfonylurea herbicides without the encapsulating material.

The liquid composition of the invention may comprise any of thesulfonylureas described herein with any of the non-sulfonylureaherbicides described herein.

For example, the liquid composition may comprise tribenuron-methyl andany of the other non-sulfonylurea herbicides described herein. Exemplarycombinations with tribenuron-methyl include: tribenuron-methyl and 2,4-D(e.g. as ester or amine or choline salt); tribenuron methyl and MCPA(e.g. as ester or amine); tribenuron-methyl and bromoxynil;tribenuron-methyl and glyphosate; tribenuron-methyl and fluroxypyr;tribenuron-methyl and dicamba (e.g. as the sodium salt or diglycolaminesalt or ester); tribenuron-methyl and mecoprop-P; tribenuron-methyl andMCPB; tribenuron-methyl, fluroxypyr and clopyralid; tribenuron-methyland carfentrazone ethyl; tribenuron-methyl and clopyralid (e.g. as MEAsalt); tribenuron-methyl and clodinafop; tribenuron-methyl andquinclorac; tribenuron-methyl and florasulam.

The liquid composition may comprise nicosulfuron and any of the othernon-sulfonylurea herbicides described herein. Exemplary combinationswith nicosulfuron include: nicosulfuron and dicamba (optionally as thesodium salt or ester); nicosulfuron and atrazine; nicosulfuron andflumetsulam; nicosulfuron and clopyralid (optionally as the potassiumsalt or ester); nicosulfuron and diflupenzopyr (optionally as the sodiumsalt or ester); nicosulfuron and metolachlor; nicosulfuron andterbuthylazine; nicosulfuron and mesotrione; and nicosulfuron andbentazone.

The liquid composition may comprise metsulfuron-methyl and any of theother non-sulfonylurea herbicides described herein. Exemplarycombinations with metsulfuron-methyl include: metsulfuron-methyl andacetochlor; metsulfuron-methyl and carfentrazone ethyl;metsulfuron-methyl and imazapyr; metsulfuron-methyl and aminopyralid;metsulfuron-methyl and fluroxypyr; metsulfuron-methyl and mecoprop-p;metsulfuron-methyl and picloram; metsulfuron-methyl and pyraflufenethyl; metsulfuron-methyl and propanil; metsulfuron-methyl andglyphosate-ammonium; metsulfuron-methyl and dicamba (optionally as thesodium, dimethylammonium or diglycolamine salt or as an ester);metsulfuron-methyl and 2,4-D (optionally as the dimethylammonium salt,choline salt, or an ester); and metsulfuron-methyl, dicamba (optionallyas the sodium, dimethylammonium or diglycolamine salt or as an ester)and 2,4-D (optionally as the dimethylammonium salt, choline salt, or anester).

Further exemplary combinations of sulfonylureas and non-sulfonylureasfor use in the present invention include: bensulfuron-methyl andacetochlor; bensulfuron-methyl and indanofan; bensulfuron-methyl andclomeprop; bensulfuron-methyl and pretilachlor; bensulfuron-methyl andfentrazamide; bensulfuron-methyl and thenylchlor; bensulfuron-methyl andpentoxazone; bensulfuron-methyl and pyriminobac-methyl;bensulfuron-methyl and bromobutide; bensulfuron-methyl, pentoxazone,pyriminobac-methyl, and bromobutide; bensulfuron-methyl and butachlor;bensulfuron-methyl and daimuron; bensulfuron-methyl and mefenacet;bensulfuron-methyl, daimuron and mefenacet; chlorimuron ethyl andsulfentrazone; iodosulfuron-methyl (optionally as the sodium salt) andisoxadifen-ethyl; iodosulfuron-methyl (optionally as the sodium salt)and propoxycarbazone (optionally as the sodium salt);iodosulfuron-methyl (optionally as the sodium salt) and diflufenican;iodosulfuron-methyl (optionally as the sodium salt) andfenoxaprop-P-ethyl; mesosulfuron (and/or as the methyl ester) anddiflufenican; mesosulfuron (and/or as the methyl ester) andpropoxycarbazone (e.g. sodium salt); pyrazosulfuron-ethyl andpretilachlor; pyrazosulfuron-ethyl and pyriftalid; pyrazosulfuron-ethyland mefenacet; pyrazosulfuron-ethyl and esprocarb; pyrazosulfuron-ethyland dimethametryn; pyrazosulfuron-ethyl and oxaziclomefone;pyrazosulfuron-ethyl and benzobicyclon; pyrazosulfuron-ethyl andcyhalofop-butyl; pyrazosulfuron-ethyl and penoxsulam;pyrazosulfuron-ethyl, cyhalofop-butyl, pretilachlor, and dimethametryn;pyrazosulfuron-ethyl, benzobicyclon and penoxsulam;pyrazosulfuron-ethyl, benzobicyclon, dimethametryn and oxaziclomefone;pyrazosulfuron-ethyl, pretilachlor, dimethametryn, and esprocarb;pyrazosulfuron-ethyl, benzobicyclon, butachlor and pyraclonil;pyrazosulfuron-ethyl, benzobicyclon and fentrazamide; foramsulfuron andisoxadifen ethyl; foramsulfuron and cyprosulfamide; foramsulfuron andthiencarbazone-methyl; foramsulfuron, iodosulfuron-methyl sodium salt,and isoxadifen ethyl; foramsulfuron, iodosulfuron-methyl sodium salt,cyprosulfamide and thiencarbazone-methyl; iodosulfuron andthiencarbazone-methyl; metsulfuron methyl, bensulfuron-methyl andacetochlor; thifensulfuron-methyl, chlorimuron-ethyl and flumioxazin;rimsulfuron and mesotrione; rimsulfuron and metolachlor; rimsulfuron anddicamba; rimsulfuron, metolachlor and dicamba; thifensulfuron-methyl andone or more of dicamba, 2,4-D-ester, MCPA-ester, clodinafop, quinclorac,fluroxypyr, acetochlor, lenacil and prometryn; chlorimuron-ethyl andacetochlor; chlorimuron-ethyl and metribuzin; chlorimuron-ethyl andimazethapyr.

4.6.2 Safeners

The composition of the present invention may comprise one or moresafeners that may be dissolved, dispersed, suspended or otherwisecontained in the composition. Suitable safeners are those listed in the“The Pesticide Manual” (ISBN-10: 190139686X), as well as those listed inparagraphs [0113] to [0129] of US 2006/0276337 A1, which paragraphs areincorporated herein by reference.

Exemplary safeners include:

-   -   (1) compounds of the type of        dichlorophenylpyrazoline-3-carboxylic acid such as ethyl        1-(2,4-dichlorophenyl)-5-(ethoxy-carbonyl)-5-methyl-2-pyrazoline-3-carboxylate        and related compounds, as described in WO 91/07874;    -   (2) derivatives of dichlorophenylpyrazolecarboxylic acid,        preferably compounds such as ethyl        1-(2,4-dichlorophenyl)-5-methylpyrazole-3-carboxylate, ethyl        1-(2,4-dichlorophenyl)-5-isopropylpyrazole-3-carboxylate, ethyl        1-(2,4-dichlorophenyl)-5-(1,1-dimethylethyl)pyrazole-3-carboxylate,        ethyl 1-(2,4-dichlorophenyl)-5-phenylpyrazole-3-carboxylate and        related compounds, as described in EP-A-333 131 and EP-A-269        806;    -   (3) compounds of the type of the triazolecarboxylic acids,        preferably compounds such as fenchlorazole, i.e. ethyl        1-(2,4-dichlorophenyl)-5-trichloro-methyl-(1H)-1,2,4-triazole-3-carboxylate,        and related compounds (see EP-A-174 562 and EP-A-346 620);    -   (4) compounds of the type of the 5-benzyl- or        5-phenyl-2-isoxazoline-3-carboxylic acid, or the        5,5-diphenyl-2-isoxazoline-3-carboxylic acid, preferably        compounds such as ethyl        5-(2,4-dichlorobenzyl)-2-isoxazoline-3-carboxylate or ethyl        5-phenyl-2-isoxazoline-3-carboxylate and related compounds, as        described in WO 91/08202, or ethyl        5,5-diphenyl-2-isoxazolinecarboxylate or n-propyl ester or ethyl        5-(4-fluorophenyl)-5-phenyl-2-isoxazoline-3-carboxylate, as        described in the patent application (WO-A-95/07897);    -   (5) compounds of the type of the 8-quinolineoxyacetic acid,        preferably 1-methylhex-1-yl (5-chloro-8-quinolineoxy)acetate,        1,3-dimethylbut-1-yl (5-chloro-8-quinolineoxy)acetate,        4-allyloxybutyl (5-chloro-8-quinolineoxy)acetate,        1-allyloxyprop-2-yl (5-chloro-8-quinolineoxy)acetate, ethyl        (5-chloro-8-quinolineoxy)acetate, methyl        (5-chloro-8-quinolineoxy)acetate, allyl        (5-chloro-8-quinolineoxy)acetate,        2-(2-propylideneiminooxy)-1-ethyl        (5-chloro-8-quinolineoxy)acetate, 2-oxoprbp-1-yl        (5-chloro-8-quinolineoxy)acetate and related compounds, as        described in EP-A-86 750, EP-A-94 349 and EP-A-191 736 or EP-A-0        492 366;    -   (6) compounds of the type of the        (5-chloro-8-quinolineoxy)malonic acid, preferably compounds such        as diethyl (5-chloro-8-quinolineoxy)malonate, diallyl        (5-chloro-8-quinolineoxy)malonate, methyl ethyl        (5-chloro-8-quinoline-oxy)malonate and related compounds, as        described in EP-A-0 582 198;    -   (7) active compounds of the type of the phenoxyacetic or        -propionic acid derivatives or the aromatic carboxylic acids,        such as, for example, 2,4-dichlorophenoxyacetic acid (esters),        4-chloro-2-methylphenoxy-propionic esters, MCPA or        3,6-dichloro-2-methoxybenzoic acid (esters);    -   (8) active compounds of the type of the pyrimidines, such as        “fenclorim”;    -   (9) active compounds of the type of the dichloroacetamides,        which are frequently used as pre-emergence safeners (soil-acting        safeners), such as, for example, “dichlormid”        (—N,N-diallyl-2,2-dichloroacetamide), “R-29148”        (3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidone from        Stauffer), “benoxacor”        (4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine),        “PPG-1292”        (—N-allyl-N-[(1,3-dioxolan-2-yl)methyl]dichloroacetamide from        PPG Industries), “DK-24”        (—N-allyl-N-[(allylaminocarbonyl)methyl]dichloroacetamide from        Sagro-Chem), “AD-67” or “MON 4660”        (3-dichloroacetyl-1-oxa-3-azaspiro[4,5]decane from Nitrokemia or        Monsanto), “dicyclonon” or “BAS145138” or “LAB145138”        ((3-dichloroacetyl-2,5,5-tri-methyl-1,3-diazabicyclo[4.3.0]nonane        from BASF) and “furilazol” or “MON 13900”        ((RS)-3-dichloroacetyl-5-(2-furyl)-2,2-dimethyloxazolidone);    -   (10) active compounds of the type of the dichloroacetone        derivatives, such as, for example, “MG 191” (CAS-Reg. No.        96420-72-3) (2-dichloromethyl-2-methyl-1,3-dioxolane from        Nitrokemia);    -   (11) active compounds of the type of the oxyimino compounds,        such as, for example, “oxabetrinil”        ((Z)-1,3-dioxolan-2-ylmethoxyimino-(phenyl)acetonitrile),        “fluxofenim” (1-(4-chlorophenyl)-2,2,2-trifluoro-1-ethanone        O-(1,3-dioxolan-2-ylmethyl) oxime, and “cyometrinil” or        “CGA43089” ((Z)-cyanomethoxyimino-(phenyl)acetonitrile);    -   (12) active compounds of the type of the thiazolecarboxylic        esters, which are known as seed dressings, such as, for example,        “flurazole” (benzyl        2-chloro-4-trifluoromethyl-1,3-thiazole-5-carboxylate);    -   (13) active compounds of the type of the naphthalenedicarboxylic        acid derivatives, such as, for example, “naphthalic anhydride”        (1,8-naphthalenedicarboxylic anhydride);    -   (14) active compounds of the type of the chromanacetic acid        derivatives, such as, for example, “CL 304415” (CAS-Reg. No.        31541-57-8) (2-(4-carboxychroman4-yl)acetic acid from American        Cyanamid);    -   (15) active compounds which, in addition to a herbicidal action        against harmful plants, also have safener action on crop plants        such as, for example, “dimepiperate” or “MY-93”        (—S-1-methyl-1-phenylethyl piperidine-1-thiocarboxylate),        “daimuron” or “SK 23”        (1-(1-methyl-1-phenylethyl)-3-p-tolyl-urea), “cumyluron” or        “JC-940”        (3-(2-chlorophenylmethyl)-1-(1-methyl-1-phenyl-ethyl)urea, see        JP-A-60087254), “methoxyphenone” or “NK 049”        (3,3′-dimethyl-4-methoxybenzophenone), “CSB”        (1-bromo-4-(chloromethylsulfonyl)benzene) (CAS-Reg No.        54091-06-4 from Kumiai).

Preferred herbicide safeners for use in the present invention includebenoxacor, BCS (1-bromo-4-[(chloromethyl)sulfonyl]benzene),cloquintocet-mexyl, cyometrinil, cyprosulfamide, dichlormid, dicyclonon,2-(dichloromethyl)-2-methyl-1,3-dioxolane (MG 191), dietholate,fenchlorazole-ethyl, fenclorim, flurazole, fluxofenim, furilazole,isoxadifen-ethyl, jiecaowan, jiecaoxi, mefenpyr, mefenpyrethyl,methoxyphenone ((4-methoxy-3-methylphenyl)(3-methylphenyl)methanone),mephenate, naphthalic anhydride and oxabetrinil.

The liquid composition of the invention may comprise any of thesulfonylureas described herein with any suitable safener describedherein. Exemplary combinations of sulfonylurea and safener include:iodosulfuron-methyl (optionally as the sodium salt) andmefenpyr-diethyl; mesosulfuron (and/or as the methyl ester) andmefenpyr-di-ethyl; mesosulfuron (and/or as the methyl ester) andpropoxycarbazone (e.g. sodium salt) and mefenpyr-di-ethyl.

4.6.3 Other Salts

The liquid composition of the invention may comprise further salts suchas those disclosed in PCT/EP2015/080844. For instance, in addition tothe lithium salt as described herein, the liquid composition of theinvention may comprise an inorganic salt selected from the metalcarbonates and metal phosphates. Preferred additional salts includethose where the inorganic salt is selected from alkali metal phosphatesand alkali metal carbonates or where the inorganic salt comprises ametal selected from Na, K, Ca, Mg or Al. Particularly preferred arethose salts selected from Na₃PO₄, K₃PO₄, Mg₃(PO₄)₂, A1PO₄, and Na₂CO₃.

4.7 Co-Formulants

The composition of the invention may comprise one or more additionalco-formulants such as surfactants (e.g. emulsifiers and/or dispersants),thickeners and thixotropic agents, wetting agents, anti-drift agents,adhesives, penetrants, preservatives, antifreeze agents, antioxidants,solubilizers, fillers, carriers, colorants, antifoams, fertilizers,evaporation inhibitors and agents which modify pH and viscosity. Becausethe lithium salts as described herein are capable of stabilising thesulfonylurea with less thickening of the sulfonylurea-containingcomposition, the present invention provides improved freedom toformulators to tailor the composition to particular needs. For instance,the present invention allows additional actives as well as additionalco-formulants to be added that would not be suitable in compositionsthat might have already been thickened by the stabilising agent. In oneembodiment of the invention the liquid composition comprises at leastone co-formulant that is an adjuvant, such as one of those listed in theCompendium of Herbicide Adjuvants, 12th Edition, Southern IllinoisUniversity, 2014, or any earlier edition thereof. Examples of commonlyused adjuvants include, but are not limited to, paraffin oil,horticultural spray oils (e.g., summer oil), methylated rape seed oil,methylated soybean oil, highly refined vegetable oil and the like,polyol fatty acid esters, polyethoxylated esters, ethoxylated alcohols,alkyl polysaccharides and blends, amine ethoxylates, sorbitan fatty acidester ethoxylates, polyethylene glycol esters, alkylpolyglucosides andtheir derivatives (e.g. esters), organosilicone based surfactants,ethylene vinyl acetate terpolymers, ethoxylated alkyl aryl phosphateesters and the like.

Preferably, the liquid composition of the invention includes one or moresurfactants, for example, to enable the forming an emulsion if thecompositions are to be diluted with water. These surfactants can becationic, anionic or non-ionic, but are preferably anionic or non-ionic.

Preferred non-ionic surfactants for use in this invention include:polyalkoxylated, preferably polyethoxylated, saturated and unsaturatedaliphatic alcohols having 8 to 24 carbon atoms in the alkyl radical,which is derived from the corresponding fatty acids or frompetrochemical products, and having 1 to 100, preferably 2 to 50,ethylene oxide units (EO), it being possible for the free hydroxyl groupto be alkoxylated, which are commercially available, for example, asGenapol® X and Genapol® 0 series (Clariant), Crovol® M series (Croda) oras Lutensol® series (BASF); polyalkoxylated, preferably polyethoxylated,arylalkylphenols, such as, for example, 2,4,6-tris(1-phenylethyl)phenol(tristyrylphenol) having an average degree of ethoxylation of between 10and 80, preferably from 16 to 40, such as, for example, Soprophor® BSU(Rhodia) or HOE S 3474 (Clariant); polyalkoxylated, preferablypolyethoxylated, alkylphenols having one or more alkyl radicals, suchas, for example, nonylphenol or tri-sec-butylphenol, and a degree ofethoxylation of between 2 and 40, preferably from 4 to 15, such as, forexample, Arkopal® N series or Sapogenat® T series (Clariant);polyalkoxylated, preferably polyethoxylated, hydroxyfatty acids orglycerides which contain hydroxyfatty acids, such as, for example,ricinine or castor oil, having a degree of ethoxylation of between 10and 80, preferably from 25 to 40, such as, for example, the Emulsogen®EL series (Clariant) or the Agnique® CSO series (Cognis);polyalkoxylated, preferably polyethoxylated, sorbitan esters, such as,for example, Atplus® 309 F (Uniqema) or the Alkamuls® series (Rhodia);polyalkoxylated, preferably polyethoxylated, amines, such as, forexample, Genamin® series (Clariant), Imbentin® CAM series (Kolb) orLutensol® FA series (BASF); di- and tri-block copolymers, for examplefrom alkylene oxides, for example from ethylene oxide and propyleneoxide, having average molar masses between 200 and 10 000, preferablyfrom 1000 to 4000 g/mol, the proportion by mass of the polyethoxylatedblock varying between 10 and 80%, such as, for example, the Genapol® PFseries (Clariant), the Pluronic® series (BASF), or the Synperonic® PEseries (Uniqema).

Preferred ionic surfactants for use in this invention include:polyalkoxylated, preferably polyethoxylated, surfactants which areionically modified, for example by conversion of the terminal freehydroxyl function of the polyethylene oxide block into a sulfate orphosphate ester (for example as alkali metal and alkaline earth metalsalts), such as, for example, Genapol® LRO or dispersant 3618(Clariant), Emulphor® (BASF) or Crafol® AP (Cognis); alkali metal andalkaline earth metal salts of alkylarylsulfonic acids having astraight-chain or branched alkyl chain, such as phenylsulfonate CA orphenylsulfonate CAL (Clariant), Atlox® 3377BM (ICI), or the Empiphos® TMseries (Huntsman); polyelectrolytes, such as lignosulfonates,condensates of naphthalenesulfonate and formaldehyde,polystyrenesulfonate or sulfonated unsaturated or aromatic polymers(polystyrenes, polybutadienes or polyterpenes), such as the Tamol®series (BASF), Morwet® D425 (Witco), the Kraftsperse® series (Westvaco)or the Borresperse® series (Borregard).

Surfactants that can also be used in the present invention includeorgano-modified siloxanes (OMS) such as those disclosed in theCompendium of Herbicide Adjuvants, 12th Edition, Southern IllinoisUniversity, 2014, or any earlier edition thereof, as well as thosedisclosed in WO 2008/155108 A2 (GAT Microencapsulation), as well as thepolyether-polysiloxane copolymers described in GB 2496643 (RotamAgrochem), including those available from Evonik Industries under thetrade names Break-Thru 9902™, Break-Thru 9903™, Break-Thru 5503™,Break-Thru 9907™ and Break-Thru 9908™.

If the liquid composition of the invention comprises one or moresurfactants then the surfactant is preferably included in an amount ofat least 1 wt. % with respect to the total weight of the composition.More preferably, the surfactant is comprised in an amount of at least 2wt. %, at least 5 wt. %, at least 10 wt. %, at least 15 wt. %, or atleast 20 wt. %. The surfactant is preferably comprised in thecomposition an amount of 60 wt. % or less. More preferably, thesurfactant is comprised in an amount of 50 wt. % or less, 40 wt. % orless, or 30 wt. % or less. Any of the disclosed wt. % lower limits forthe amount of surfactant can be combined with any of the disclosed wt. %upper limits to define further suitable wt. % ranges for the purposes ofthis invention. As an example, further exemplary ranges for the amountof surfactant in the liquid composition include 1 to 60 wt. %, 2 to 50wt. %, 5 to 40 wt. %, 10 to 30 wt. %, 5 to 50 wt. % and 2 to 40 wt. %.Where more than one surfactant is used the preferred ranges refer to thetotal amount of surfactant present in the liquid composition.

4.8 Method of Preparation

The composition of the invention can be prepared by known processes, forexample by mixing the components and milling the suspended solids ordissolving the solids. Thus, it is possible, for example, to prepare apremix by dissolving soluble auxiliaries and additives in thenon-aqueous solvent system. Any soluble agrochemically active compoundsused can also be dissolved in the premix. Once the dissolution processhas ended, solid sulfonylurea, any other insoluble agrochemically activecompounds used and the lithium salts can be suspended in the mixture.The coarse suspension is, if appropriate after pregrinding, subjected tofine grinding. In another embodiment, solid sulfonylurea and, ifappropriate, any insoluble components used are suspended in thenon-aqueous solvent system and subjected to grinding. Any soluble activecompounds used and any auxiliaries and additives which do not requiregrinding or are not required for the grinding process can be added aftergrinding.

To prepare the mixtures, it is possible to use customary mixingapparatus which, if required, are thermostatted. For pre-grinding, it ispossible to use, for example, high-pressure homogenizers or millsoperating by the rotor-stator principle, such as Ultraturraxhomogenizers, for example those from IKA, or toothed colloid mills, forexample from Puck or Fryma. For fine grinding, it is possible to use,for example, bead mills which operate batchwise, for example from Drais,or bead mills which operate continuously, for example from Bachofen orEiger.

4.9 Chemical Stability

The invention is concerned with improving chemical stability of asulfonylurea herbicide in liquid composition comprising a non-aqueoussolvent system. Improved chemical stability may be achieved byincluding, in the liquid composition, at least one inorganic or C₁-C₁₂organic lithium salt as discussed herein. The sulfonyl urea, the lithiumsalt and the non-aqueous solvent system (as well as any other componentsin the composition) can be selected to meet desired needs such as toensure that the liquid composition conforms with one or more localregulatory requirements.

In one aspect of the invention, the sulfonyl urea, the lithium salt andthe non-aqueous solvent system are selected such that the sulfonyl ureaexhibits at least 85% chemical stability. Preferably, the sulfonyl ureaexhibits at least 90% chemical stability, more preferably at least 95%chemical stability, and still more preferably at least 98% chemicalstability. Chemical stability can be determined as a percentage of thesulfonyl urea remaining (e.g. as determined by HPLC) when the liquidcomposition (e.g. a 50 ml sample of the liquid composition in a 60 mlhermetically sealed Winchester bottle) has been stored at 54° C. for twoweeks relative to a corresponding control sample that has been stored at−10° C. for two weeks.

In another aspect of the invention, the liquid composition is one wherechemical stability of the sulfonyl urea is improved by at least 2%compared to a corresponding liquid composition that does not contain alithium salt according to the invention (instead of salt, an equivalentextra wt. % of solvent is used). Chemical stability of the sulfonylureafor each of the salt-containing liquid composition and the non-saltcontrol composition can be determined as described immediately above.The difference in chemical stability can then be calculated to determinethat an improvement of at least 2% is achieved. Preferably, the sulfonylurea exhibits at least a 5% improvement, more preferably at least a 10%improvement, and even more preferably at least a 50% improvement inchemical stability.

Since the invention is particularly suited to improving the chemicalstability of sulfonylureas that are typically considered to be unstablein liquid compositions (e.g. iodosulfuron-methyl orhalosulfuron-methyl), in still a further aspect of the invention theliquid composition is one where the sulfonyl urea exhibits at least 85%chemical stability (as described above), and is one where the chemicalstability of the sulfonyl urea is improved by at least 10% compared to acorresponding liquid composition that does not contain a lithium saltaccording to the invention (as described above). In this aspect it ispreferable that the sulfonyl urea exhibits at least 90% chemicalstability, more preferably at least 95% chemical stability, and evenmore preferably at least 98% chemical stability.

In each of the above aspects, where the liquid composition comprisesmore than one sulfonyl urea, the chemical stability, or improvementthereon, is determined based on the total amount of sulfonylureaherbicide in the composition.

4.10 Application of the Composition

The composition of the invention can be applied directly or can bediluted with water and then applied to plant foliage and/or soil bymethods commonly employed in the art, such as conventional high-volumehydraulic sprays, low-volume sprays, air-blast, and aerial sprays. Thediluted composition may be applied to the plant foliage or to the soilor area adjacent to the plant. The selection of the specific herbicidalcompounds in the composition (both sulfonylureas and non-sulfonylureas)and their rates and mode of application are determined by theselectivity of the herbicidal compounds to specific crops and by theprevalent weed species to be controlled and are known to those skilledin the art (e.g. see “The Pesticide Manual” (ISBN-10: 190139686X) andall earlier editions thereof).

4.11 Further Exemplary Liquid Compositions of the Invention

While not intending to be limiting in any way, some further embodimentsof the liquid compositions of the invention are as follows:

(i) An oil dispersion (OD) comprising a suspension of lithium acetateand at least one sulfonylurea in a non-aqueous solvent system, whereinthe at least one sulfonylurea is selected from metsulfuron,halosulfuron, iodosulfuron, pyrazosulfuron, amidosulfuron, or estersand/or salts thereof.(ii) An oil dispersion (OD) comprising a suspension of lithium carbonateand iodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(iii) An oil dispersion (OD) comprising a suspension of lithium formateand iodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(iv) An oil dispersion (OD) comprising a suspension of lithium chlorideand iodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(v) An oil dispersion (OD) comprising a suspension of lithium citrateand iodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(vi) An emulsifiable concentrate (EC) comprising lithium acetate and atleast one sulfonylurea in a non-aqueous solvent system, wherein the atleast one sulfonylurea is selected from metsulfuron, halosulfuron,iodosulfuron, pyrazosulfuron, amidosulfuron, or esters and/or saltsthereof.(vii) An emulsifiable concentrate (EC) comprising lithium carbonate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(viii) An emulsifiable concentrate (EC) comprising lithium formate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(ix) An emulsifiable concentrate (EC) comprising lithium chloride andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(x) An emulsifiable concentrate (EC) comprising lithium citrate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(xi) An soluble concentrate (SL) comprising lithium acetate and at leastone sulfonylurea in a non-aqueous solvent system, wherein the at leastone sulfonylurea is selected from metsulfuron, halosulfuron,iodosulfuron, pyrazosulfuron, amidosulfuron, or esters and/or saltsthereof.(xii) An soluble concentrate (SL) comprising lithium carbonate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(xiii) An soluble concentrate (SL) comprising lithium formate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(xiv) An soluble concentrate (SL) comprising lithium chloride andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(xv) An soluble concentrate (SL) comprising lithium citrate andiodosulfuron or esters and/or salts thereof in a non-aqueous solventsystem.(xvi) The liquid composition according to any one of embodiments (i) to(xv) above, wherein metsulfuron is metsulfuron-methyl (optionally as thesodium salt), halosulfuron is halosulfuron-methyl, iodosulfuron isiodosulfuron-methyl (optionally as the sodium salt), and pyrazosulfuronis pyrazosulfuron-ethyl.(xvii) The liquid composition according to any one of embodiments (i) to(xvi) above, wherein the sum amount of sulfonylurea in the compositionsis from 0.1 to 60 wt. %, preferably from 1 to 20 wt. %, and morepreferably from 5 to 15 wt. %.(xviii) The liquid composition according to any one of embodiments (i)to (xvii) above, wherein the amount of lithium acetate (embodiments (i),(vi), (xi)) or lithium carbonate (embodiments (ii), (vii), (xii)) orlithium formate (embodiments (iii), (viii), (xiii)) or lithium chloride(embodiments (iv), (ix), (xiv)) or lithium citrate (embodiments (v),(x), (xv)) in the liquid composition is from 0.01 to 30 wt. %,preferably from 1 to 20 wt. %, and more preferably from 5 to 15 wt. %.(xix) The liquid composition according to any one of embodiments (i) to(xviii) above, wherein the weight ratio of the lithium salt to the sumamount of sulfonylurea is from 0.1 to 5, preferably from 0.3 to 3, andmore preferably from 0.5 to 2.(xx) The liquid composition according to any one of embodiments (i),(vi), (xi) comprising:

-   -   5 to 15 wt. % of metsulfuron-methyl (optionally as the sodium        salt) or halosulfuron-methyl or iodosulfuron-methyl (optionally        as the sodium salt) or pyrazosulfuron-ethyl or amidosulfuron;        and    -   5 to 15 wt. % of lithium acetate.        (xxi) The liquid composition according to any one of embodiments        (ii), (vii), (xii) comprising:    -   5 to 15 wt. % of iodosulfuron-methyl (optionally as the sodium        salt); and    -   5 to 15 wt. % of lithium carbonate.        (xxii) The liquid composition according to any one of        embodiments (iii), (viii), (xiii) comprising:    -   5 to 15 wt. % of iodosulfuron-methyl (optionally as the sodium        salt); and    -   5 to 15 wt. % of lithium formate.        (xxiii) The liquid composition according to any one of        embodiments (iv), (ix), (xiv) comprising:    -   5 to 15 wt. % of iodosulfuron-methyl (optionally as the sodium        salt); and    -   5 to 15 wt. % of lithium chloride.        (xxiv) The liquid composition according to any one of        embodiments (v), (x), (xv) comprising:    -   5 to 15 wt. % of iodosulfuron-methyl (optionally as the sodium        salt); and    -   5 to 15 wt. % of lithium citrate.

Any of the exemplary embodiments (i) to (xxiv) as listed above can befurther modified in line with the general description provided herein.By way of example, in any of the exemplary embodiments (i) to (xxiv),the sulfonylurea can be replaced with any other sulfonylurea disclosedherein and the salt can be replaced with any other salt disclosed hereinin accordance with the invention. For example, in any of the exemplaryembodiments (i) to (xxiv), the sulfonylurea can be replaced withiodosulfuron methyl (optionally as the sodium salt) and the salt can bereplaced with lithium acetate, or lithium benzoate, or lithiumoctanoate, or lithium salicylate. Likewise, in any of the exemplaryembodiments (i) to (xxiv), the lithium salt can be replaced with lithiumoctanoate and the sulfonylurea can be replaced with foramsulfuron, orchlorsulfuron, or pyrazosulfuron-ethyl, or amidosulfuron, orhalosulfuron-methyl, or iodosulfuron-methyl (optionally as the sodiumsalt).

By way of further example, the sum amount of sulfonylurea in any of theexemplary embodiments (i) to (xxiv) can be set from 1 to 50 wt. %, 2 to40 wt. %, 5 to 30 wt. %, 0.5 to 20 wt. %, 7 to 30 wt. %, and 5 to 10 wt.%. By way of a further example, the total amount of lithium salt that ispresent in the exemplary embodiments (i) to (xxiv) can be from 0.1 to 25wt. %, 1 to 20 wt. %, 1 to 10 wt. %, 0.5 to 10 wt. %, 1 to 5 wt. % and0.5 to 5 wt. %. By way of a still further example, the weight ratio ofthe total amount of lithium salt recited in the embodiments above to thetotal amount of recited sulfonylurea can be from 0.2 to 4, 0.3 to 3, 0.5to 2, 0.7 to 2, 0.1 to 2, 1 to 2 and 1 to 5. By way of a furtherexample, any of the exemplary embodiments including metsulfuron ormetsulfuron-methyl (in both cases, optionally as the sodium salt) canfurther comprise fluroxypyr-meptyl as a non-sulfonylurea. By way ofstill a further example, the lithium salt in any of the aboveembodiments (i) to (xxiv) can be replaced with another lithium salt asdescribed herein, for example, lithium octanoate or lithium benzoate.Any of the exemplary embodiments (i) to (xxiv) or as described hereincan further comprise a surfactant and/or a safener.

5. EXAMPLES

The oil dispersions described in the following examples were prepared asfollows.

(i) Preparation of a 25 wt. % Sulfonylurea Millbase

Sulfonylurea was added to a solvent in an amount of 25 wt. %. Themixture was placed in a mill (Eiger Torrance Mini Mill) containing glassbeads (1.0-1.25 mm). The suspension was then milled to provide a 25 wt.% sulfonylurea millbase having a particle size (D50) between 2 and 3 μm.

(ii) Preparation of a 25 wt. % Lithium Salt Millbase

Lithium salt was added to solvent in an amount of 25 wt. % and milled asdescribed above to provide a 25 wt. % lithium salt millbase having aparticle size (D50) between 2 and 3 μm.

(iii) Preparation of the Oil Dispersion

An appropriate amount of the milled concentrate of sulfonylurea (i) wasblended with solvent (optionally containing surfactant) untilhomogenous, and then further blended with milled concentrate of lithiumsalt (ii) until homogenous, resulting in the oil dispersions asdescribed in the tables below.

The liquid formulations were stored in tightly closed glass bottles inthermostatically controlled incubators at 54° C. for two weeks withcontrol samples stored at −10° C. After storage, all formulations wereanalysed for active ingredient content(s) by HPLC. Stability is reportedwith respect to the amount of active ingredient remaining relative to acorresponding sample stored at −10° C. for two weeks.

EXAMPLE 1—EFFECT OF A LITHIUM SALT ON SU STABILISATION

Oil dispersions of iodosulfuron-methyl sodium salt (IMS) with or withoutadded acetate salt were prepared and tested to determine the chemicalstability of the sulfonylurea after storage at 54° C. for two weeks. Theresults are summarised in Table 1 below.

TABLE 1 Example Comparative Examples Components (wt. %) OD1 OD2 OD3 OD4OD5 IMS 10 10 10 10 10 lithium acetate 10 sodium acetate 10 potassiumacetate 10 magnesium acetate 10 Atlas G1086 14 14 14 14 14 Nansa EVM70/2E 6 6 6 6 6 isobornyl acetate to to to to to 100 100 100 100 100Stability (%) 99.4 84.5 55.6 54.7 74.1

The chemical stability of a sulfonylurea-containing oil dispersioncomprising lithium acetate (OD1) is superior to that of a correspondingoil dispersion comprising sodium acetate (OD2), potassium acetate (OD3),magnesium acetate (OD4) or no salt (OD5).

EXAMPLE 2—EFFECT OF VARIOUS CO-FORMULATED LITHIUM SALTS ON SUSTABILISATION

Oil dispersions of iodosulfuron-methyl sodium (IMS) with or withoutadded lithium and sodium salts were prepared and tested to determine thechemical stability of the sulfonylurea after storage at 54° C. for twoweeks. The results are summarised in Table 2-1 and Table 2-2 below.

TABLE 2-1 Examples Comparative Examples Components (wt. %) OD 6 OD 7 OD8 OD 9 OD 10 OD 11 OD 12 OD 13 OD 14 OD 15 IMS 10 10 10 10 10 10 10 1010 10 lithium formate 10 lithium acetate 10 lithium citrate 10 lithiumoctanoate 10 lithium benzoate 10 sodium formate 10 sodium acetate 10sodium citrate 10 sodium octanoate 10 sodium benzoate 10 Atlas G1086 1414 14 14 14 14 14 14 14 14 Nansa EVM 70/2E 6 6 6 6 6 6 6 6 6 6 isobornylacetate to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100to 100 Stability (%) 96.5 99.4 97.1 98.6 98.5 82.9 84.5 78.9 86.0 81.7

TABLE 2-2 Examples Comparative Examples OD OD OD OD OD OD Components(wt. %) 16 17 18 19 20 21 IMS 10 10 10 10 10 10 lithium carbonate 10lithium chloride 10 lithium sulphate 10 sodium carbonate 10 sodiumchloride 10 sodium sulphate 10 Atlas G1086 14 14 14 14 14 14 Nansa EVM70/2E 6 6 6 6 6 6 isobornyl acetate to 100 to to 100 to 100 to to 100100 100 Stability (%) 98.2 78.3 90.4 82.6 72.5 74.5

The chemical stability of a sulfonylurea-containing oil dispersionscomprising a lithium salt (OD6-OD10; OD16-OD18) is superior to an oildispersion with the corresponding sodium salt (OD11-OD15; OD19-OD21),irrespective if the salt is an organic salt (Table 2-1) or an inorganicsalt (Table 2-2). Stability without any salt after storage at 54° C. fortwo weeks is 74.1% (see OD5 in Table 1). Thus, while sodium salts canimprove stability of the sulfonylurea, the corresponding lithium saltimproves stability to an even greater extent.

EXAMPLE 3—VARIOUS SULFONYLUREAS CAN BE STABILISED WITH A LITHIUM SALT

Oil dispersions of various sulfonylureas with or without added lithiumacetate salt were prepared and tested to determine the chemicalstability of the sulfonylurea after storage at 54° C. for two weeks. Theresults are summarised in Table 3 below.

TABLE 3 Examples Comparative Examples OD OD OD OD OD OD OD OD OD ODComponents (wt. %) 22 23 24 25 26 27 28 29 30 31 metsulfuron methyl 5 5halosulfuron-methyl 10 10 IMS 10 10 pyrazosulfuron-ethyl 5 5amidosulfuron 5 5 lithium acetate 5 10 10 5 5 — — — — — Soprophor BSU 2020 20 20 20 20 Atlas G1086 14 14 14 14 Nansa EVM 70/2E 6 6 6 6 isobornylacetate to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100to 100 Stability (%) 100 83.9 99.4 84 91 85.7 77.1 74.1 79 85

The chemical stability of a sulfonylurea-containing oil dispersionscomprising an inorganic acid salt of lithium (OD22-OD26) were found tobe superior to corresponding oil dispersions with no co-formulatedlithium salt (OD27-OD31). Improved stability is achieved for differentamounts of sulfonylurea, different amounts of lithium salt, anddifferent surfactant systems.

EXAMPLE 4—EFFECT OF CO-FORMULATED LITHIUM CARBONATE SALT ON SUSTABILISATION

Oil dispersions of iodosulfuron-methyl sodium salt orhalosulfuron-methyl with or without added lithium carbonate salt wereprepared and tested to determine the chemical stability of thesulfonylurea after storage at 54° C. for two weeks. The results aresummarised in Table 4 below.

TABLE 4 Examples Comparative Examples Components (wt. %) OD32 OD33 OD34OD35 iodosulfuron-methyl 10 10 sodium salt halosulfuron-methyl 10 10lithium carbonate 10 10 — — Atlas G1086 14 14 14 14 Nansa EVM 70/2E 6 66 6 isobornyl acetate to to to to 100 100 100 100 Stability (%) 98.287.5 74.1 77.1

The chemical stability of sulfonylurea-containing oil dispersionscomprising an inorganic acid salt of lithium (OD32 and OD33) were foundto be superior to oil dispersions with no co-formulated lithium salt(OD34 and OD35).

EXAMPLE 5—COMPARISON OF A LI C8-ORGANIC ACID SALT AND A LI C16-ORGANICACID SALT FOR VARIOUS SULFONYLUREAS

Oil dispersions of various sulfonylureas with or without added lithiumoctanoate and lithium 12-hydroxystearate were prepared and tested todetermine the chemical stability of the sulfonylurea after storage at54° C. for two weeks. The results are summarised in Table 5-1 (withsalt) and Table 5-2 (no salt) below.

TABLE 5-1 Examples Comparative Examples OD OD OD OD OD OD OD OD OD ODComponents (wt. %) 36 37 38 39 40 41 42 43 44 45 foramsulfuron 10 10chlorsulfuron 10 10 pyrazosulfuron-ethyl 10 10 amidosulfuron 10 10halosulfuron-methyl 10 10 lithium octanoate 10 10 10 10 10 — 13 — — —Lithium 12- — — — — — 10 10 10 10 10 hydroxystearate Atlas G1086 14 1414 14 14 14 14 14 14 14 Nansa EVM 70/2E 6 6 6 6 6 6 6 6 6 6 isobornylacetate to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100to 100 Stability (%) 90.9 90.0 99.7 99.1 98.3 71.3 62.1 90.1 90.1 48.0

TABLE 5-2 Comparative Examples Components (wt. %) OD46 OD47 OD48 OD49OD50 foramsulfuron 10 chlorsulfaron 10 pyrazosulfuron-ethyl 10amidosulfuron 10 halosulfuron-methyl 10 lithium octanoate — — — — —lithium 12- — — — — — hydroxystearate Atlas G1086 14 14 14 14 14 NansaEVM 70/2E 6 6 6 6 6 isobornyl acetate to to to to to 100 100 100 100 100Stability (%) 82.3 86.4 91.9 93.5 77.1

The chemical stability of sulfonylurea-containing oil dispersionscomprising a C8 organic acid salt of lithium (OD36-OD40) were found tobe superior to corresponding oil dispersions with the C16 organic acidsalt of lithium of WO 2013/174833 (OD41-OD45) as well as correspondingoil dispersions with no salt (OD46-OD50). A comparison of OD23 (Table3), OD33 (Table 4) and OD45 (Table 5-1) shows that lithium acetate andlithium carbonate also provide a superior stabilising effect thanlithium 12-hydroxystearate.

EXAMPLE 6—COMPARISON OF A LI C8-ORGANIC ACID SALT AND A LI C16-ORGANICACID SALT AT VARIOUS CONCENTRATIONS

Oil dispersions of halosulfuron-methyl with or without added lithiumoctanoate and lithium 12-hydroxystearate at various concentrations wereprepared and tested to determine the chemical stability of thesulfonylurea after storage at 54° C. for two weeks. The results aresummarised in Table 6-1 and Table 6-2 below.

TABLE 6-1 Examples Comparative Examples OD OD OD OD OD OD OD OD OD ODComponents (wt. %) 51 52 53 54 55 56 57 58 59 60 halosulfuron-methyl 105 2.5 1 1 10 5 2.5 1 1 lithium octanoate 10 5 2.5 2 1 — — — — — Lithium12- — — — — — 10 5 2.5 2 1 hydroxystearate Atlas G1086 14 14 14 14 14 1414 14 14 14 Nansa EVM 70/2E 6 6 6 6 6 6 6 6 6 6 isobornyl acetate to 100to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 Stability(%) 98.3 98.6 98.1 96.3 95.7 48.0 24.3 40.8 34.8 43.1

TABLE 6-2 Comparative Examples Components (wt. %) OD61 OD62 OD63 OD64halosulfuron-methyl 10 5 2.5 1 lithium octanoate — — — — lithium 12- — —— — hydroxystearate Atlas G1086 14 14 14 14 Nansa EVM 70/2E 6 6 6 6isobornyl acetate to to to to 100 100 100 100 Stability (%) 77.1 54.138.2 29.0

From Table 6-2 it can be seen that the chemical stability ofhalosulfuron-methyl decreases as its amount in the OD decreases(OD61-OD64). Adding a C8 organic acid salt of lithium (OD51-OD55)improves chemical stability at all concentrations tested (see Table 6-1)and to a greater degree than that achieved with a C16 organic acid saltof lithium (OD56-OD60 of Table 6-1).

EXAMPLE 7—COMPARISON OF VARIOUS LI ORGANIC ACID SALTS FOR STABILISINGLOW-CONCENTRATION IODOSULFURON-METHYL SODIUM SALT

Oil dispersions having a low concentration (1 wt. %) iodosulfuron-methylsodium salt (IMS) with or without added lithium salts were prepared andtested to determine the chemical stability of the sulfonylurea afterstorage at 54° C. for two weeks. The results are summarised in Table 7below.

TABLE 7 Comparative Examples Examples OD OD OD OD OD OD Components (wt.%) 65 66 67 68 69 70 IMS 1 1 1 1 1 1 lithium acetate 1 lithium benzoate1 lithium octanoate 1 lithium salicylate 1 lithium 12- 1 hydroxystearateAtlas G1086 14 14 14 14 14 14 Nansa EVM 70/2E 6 6 6 6 6 6 isobornylacetate to 100 to to 100 to to 100 to 100 100 100 Stability (%) 95.395.0 87.6 81.8 77.9 60.5

The chemical stability of sulfonylurea-containing oil dispersionscomprising a lithium salt according to the invention (OD65-OD68) werefound to be superior to corresponding oil dispersions with the C16organic acid salt of lithium (OD69) as well as a corresponding oildispersion with no salt (OD70).

EXAMPLE 8—COMPARISON OF VARIOUS LI ORGANIC ACID SALTS FOR STABILISINGLOW-CONCENTRATION IODOSULFURON-METHYL SODIUM SALT IN A SOLVESSO LIQUIDSYSTEM

Oil dispersions having a low concentration (0.5 wt. %)iodosulfuron-methyl sodium salt (IMS) with or without added lithiumsalts were prepared and tested to determine the chemical stability ofthe sulfonylurea after storage at 54° C. for two weeks. In this examplethe Solvesso solvent system that was used in Table 4 of WO 2013/174833A1 was employed. The results are summarised in Table 8 below.

TABLE 8 Examples Comparative Examples Components (wt. %) OD71 OD72 OD73OD74 OD75 IMS 0.5 0.5 0.5 0.5 0.5 lithium octanoate 1 lithium benzoate 1lithium acetate 1 lithium 12- 1 hydroxystearate Emulsogen EL 400 10 1010 10 10 Ligalub PEG 15 15 15 15 15 400 MO Solvesso 200ND to to to to to100 100 100 100 100 Stability (%) 85.6 86.5 83.7 15.4 63.1

The chemical stability of sulfonylurea-containing oil dispersionscomprising a lithium salt according to the invention (OD71-OD73) werefound to be superior to corresponding oil dispersions with the C16organic acid salt of lithium (OD75) as well as a corresponding oildispersion with no salt (OD74).

EXAMPLE 9—COMPARISON OF VARIOUS LI ORGANIC ACID SALTS FOR STABILISING AMIXTURE OF SULFONYLUREAS

Oil dispersions having a mixture of sulfonylureas with or without anadded lithium salt were prepared and tested to determine the chemicalstability of the sulfonylurea after storage at 54° C. for two weeks. Theresults are summarised in Table 9 below. The sulfonylureas are numbered1-4 and their respective stabilities are reported using the samenumbering.

TABLE 9 Examples Comparative Examples OD OD OD OD OD OD OD OD ODComponents (wt. %) 76 77 78 79 80 81 82 83 84 1. iodosulfuron-methylsodium 5 5 5 5 5 5 2. halosulfuron-methyl 5 5 5 3. amidosulfuron 5 5 5 55 5 4. foramsulfuron 5 5 5 lithium octanoate 10 10 10 — — — — — —lithium 12-hydroxystearate — — — 10 10 10 — — — Atlas G1086 14 14 14 1414 14 14 14 14 Nansa EVM 70/2E 6 6 6 6 6 6 6 6 6 isobornyl acetate to100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 Stability(%) 1 98.4 97.8 — 65.7 92.9 — 17.3 33.6 — Stability (%) 2 91.5 — — 26.5— — 13.3 — — Stability (%) 3 — 96.1 90.4 — 63.9 31.1 — 78.4 41.2Stability (%) 4 — — 98.1 — — 92.0 — — 19.1

The chemical stability of mixed sulfonylurea-containing oil dispersionscomprising a lithium salt according to the invention (OD76-OD78) werefound to be superior to corresponding oil dispersions with the C16organic acid salt of lithium (OD79-OD81) as well as a corresponding oildispersion with no salt (OD82-OD84).

EXAMPLE 10—COMPARISON OF VARIOUS LI ORGANIC ACID SALTS FOR STABILISING AMIXTURE OF A SULFONYLUREA AND A NON-SULFONYLUREA

Oil dispersions having a mixture of a sulfonylurea and anon-sulfonylurea with or without an added lithium salt were prepared andtested to determine the chemical stability of the sulfonylurea afterstorage at 54° C. for two weeks. The results are summarised in Tables10-1 and 10-2 below. The sulfonylureas and the non-sulfonylureas arenumbered and their respective stabilities are reported using the samenumbering.

TABLE 10-1 Examples Comparative Examples OD OD OD OD OD OD OD OD OD ODOD OD Components (wt. %) 85 86 87 88 89 90 91 92 93 94 95 96 1.halosulfuron- 1 1 1 1 1 1 1 1 1 1 1 1 methyl 2. terbuthylazine 25 25 2525 3. s-metolachlor 32 32 32 32 4. fluroxypyr- 32 32 32 32 meptyllithium octanoate 1 — 1 — 1 — — — — — — — lithium acetate — 1 — 1 — 1 —— — — — — lithium 12- — — — — — — 1 — 1 — 1 — hydroxystearate AtlasG1086 14 14 14 14 14 14 14 14 14 14 14 14 Nansa EVM 6 6 6 6 6 6 6 6 6 66 6 70/2E isobornyl to 100 to 100 to 100 to 100 to 100 to 100 to 100 to100 to 100 to 100 to 100 to 100 acetate Stability (%) 1 76.0 75.6 70.068.6 86.8 81.9 5.6 2.6 14.9 8.5 27.1 17.8 Stability (%) 2 99.3 99.6 — —— — 100.2 100.1 — — — — Stability (%) 3 — — 97.1 97.9 — — — — 99.4 99.5— — Stability (%) 4 — — — — 100.1 100.1 — — — — 100.4 99.8

TABLE 10-2 Examples Comparative Examples OD OD OD OD OD OD OD OD OD ODOD OD Components (wt. %) 97 98 99 100 101 102 103 104 105 106 107 108 1.pyrazosulfuron- 1 1 1 1 ethyl 2. iodosulfuron- 1 1 1 1 methyl sodium 3.foramsulfuron 1 1 1 1 4. pretilachlor 32 32 32 32 5. diflufenican 25 2525 25 6. isoxadifen-ethyl 25 25 25 25 lithium octanoate 1 — 1 — 1 — — —— — — — lithium acetate — 1 — 1 — 1 — — — — — — lithium 12- — — — — — —1 — 1 — 1 — hydroxystearate Atlas G1086 14 14 14 14 14 14 14 14 14 14 1414 Nansa EVM 70/2E 6 6 6 6 6 6 6 6 6 6 6 6 isobornyl acetate to 100 to100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to100 Stability (%) 1 78.1 91.0 — — — — 45.6 39.8 — — — — Stability (%) 2— — 86.6 87.3 — — — — 53.6 31.5 — — Stability (%) 3 — — — — 53.2 26.6 —— — — 12.4 8.9 Stability (%) 4 94.3 92.8 — — — — 98.7 99.6 — — — —Stability (%) 5 — — 99.7 100.2 — — — — 99.9 100.2 — — Stability (%) 6 —— — — 94.8 98.0 — — — — 99.4 99.7

The chemical stability of a sulfonylurea when present together with anon-sulfonylurea is improved when a lithium salt according to theinvention is added as compared to a corresponding oil dispersion withthe C16 organic acid salt of lithium or no salt.

EXAMPLE 11—LIQUID COMPOSITION

A liquid composition comprising a sulfonyl urea in a non-aqueous solventsystem (N-butyl pyrrolidone) was prepared with and without an added saltand tested. The sulfonylurea was dissolved in the N-butyl pyrrolidoneand the salt (milled) was dispersed as solid particles. The stability ofthe sulfonylurea after storage at 54° C. for two weeks is reported inTable 11 below.

TABLE 11 Examples Comparative Examples Components (wt. %) 11-1 11-2 11-311-4 halosulfuron-methyl 5 10 5 10 lithium octanoate 5 10 — — SoprophorBSU 3 3 3 3 N-butyl pyrrolidone to to to to 100 100 100 100 Stability(%) 43.7 50.4 0 0

The data in Table 11 demonstrates that a lithium salt according to theinvention can stabilise a sulfonylurea in liquid compositions of theinvention even if the sulfonylurea and salt are present in differentphases.

While lithium carbonate and lithium phosphate salts can be used for thepurpose of this invention, it is also envisioned that the invention canbe worked with lithium salts other than lithium carbonate and lithiumphosphate. Thus, it should be understood that this invention alsoextends to liquid herbicidal compositions comprising a non-aqueoussolvent system; at least one sulfonylurea herbicide; and at least oneinorganic or C₁-C₁₂ organic lithium salt, wherein the at least onelithium salt is not a lithium carbonate or a lithium phosphate. Thisproviso that the at least one lithium salt is not a lithium carbonate ora lithium phosphate may be applied to all disclosures herein, includingthe appended claims, unless of course a disclosure expressly calls forthe presence of lithium carbonate and/or lithium phosphate.

The above description of the invention and included examples areintended to be illustrative and not limiting. All documents referred toherein are incorporated by reference. Various changes or modificationsin the embodiments described herein may occur to those skilled in theart. These changes can be made without departing from the scope orspirit of the invention.

1. A liquid herbicidal composition comprising: a non-aqueous solventsystem; at least one sulfonylurea herbicide; and at least one inorganicor C₁-C₁₂ organic lithium salt.
 2. The liquid herbicidal compositionaccording to claim 1, wherein the lithium salt is an inorganic lithiumsalt.
 3. The liquid herbicidal composition according to claim 1, whereinthe lithium salt is a C₁-C₁₂ organic lithium salt.
 4. The liquidherbicidal composition according to claim 1, wherein the at least oneinorganic or C₁-C₁₂ organic lithium salt has a molecular weight of 250or less.
 5. The liquid herbicidal composition according to claim 1,comprising lithium carbonate, lithium sulphate, and/or lithium chloride.6. The liquid herbicidal composition according to claim 1, comprisinglithium acetate, lithium formate, lithium citrate, lithium octanoate,lithium salicylate, and/or lithium benzoate.
 7. The liquid herbicidalcomposition according to claim 1, which is formulated as an oildispersion (OD), a dispersible concentrate (DC), an emulsifiableconcentrate (EC), or a soluble concentrate (SL).
 8. The liquidherbicidal composition according to claim 1, which is formulated as anoil dispersion (OD) and wherein at least one sulfonylurea is suspendedin the non-aqueous solvent system.
 9. The liquid herbicidal compositionaccording to claim 1, wherein at least one lithium salt is suspended inthe non-aqueous solvent system.
 10. The liquid herbicidal compositionaccording to claim 1, wherein the sulfonylurea herbicide is selectedfrom iodosulfuron, halosulfuron, metsulfuron, pyrazosulfuron,amidosulfuron, azimsulfuron, bensulfuron, chlorimuron, chlorsulfuron,cinosulfuron, cyclosulfamuron, ethametsulfuron, ethoxysulfuron,flazasulfuron, flucetosulfuron, flupyrsulfuron, foramsulfuron,imazosulfuron, iofensulfuron, mesosulfuron, metazosulfuron,nicosulfuron, orthosulfamuron, oxasulfuron, primisulfuron,propyrisulfuron, prosulfuron, rimsulfuron, sulfometuron, sulfosulfuron,thifensulfuron, triasulfuron, tribenuron, trifloxysulfuron,triflusulfuron and tritosulfuron, or salts or esters thereof.
 11. Theliquid herbicidal composition according to claim 1, wherein: the atleast one lithium salt is lithium acetate and the sulfonylurea isselected from iodosulfuron-methyl or salts thereof, halosulfuron-methylor salts thereof, metsulfuron-methyl or salts thereof,pyrazosulfuron-ethyl or salts thereof or amidosulfuron or salts thereof;or the at least one lithium salt is lithium carbonate and thesulfonylurea is selected from iodosulfuron-methyl or salts thereof, orhalosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium formate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium phosphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium chloride and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium sulphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; the at least one lithium salt islithium octanoate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; foramsulfuron or salts thereof;chlorsulfuron or salts thereof; pyrazosulfuron-ethyl or salts thereof;amidosulfuron or salts thereof; or halosulfuron-methyl or salts thereof;the at least one lithium salt is lithium benzoate and the sulfonylureais selected from iodosulfuron-methyl or salts thereof; or the at leastone lithium salt is lithium citrate and the sulfonylurea is selectedfrom iodosulfuron-methyl or salts thereof.
 12. The liquid herbicidalcomposition according to claim 1, wherein the at least one sulfonylureaherbicide is not nicosulfuron and/or not a pyridylsulfonylurea.
 13. Theliquid herbicidal composition according to claim 1, comprising at leastone non-sulfonylurea herbicidal compound.
 14. The liquid herbicidalcomposition according to claim 13, wherein at least one non-sulfonylureaherbicidal compound is dissolved in the non-aqueous solvent system. 15.The liquid herbicidal composition according to claim 13, wherein thenon-sulfonylurea herbicidal compound is selected from 2,4-D, 2,4-DB,2,3,6-TBA, acetochlor, acifluorfen, acifluorfen-sodium, aclonifen,alachlor, alloxydim, alloxydim-sodium, ametryn, amicarbazone,aminopyralid, amitrole, anilofos, asulam, atrazine, azafenidin,beflubutamid, benazolin,-benazolin-ethyl, benfuresate, bentazone,benzfendizone, benzobicyclon, benzofenap, bifenox, bilanafos,bispyribac-sodium, bromacil, bromobutide, bromofenoxim, bromoxynil,butachlor, butafenacil, butenachlor, butralin, butroxydim, butylate,cafenstrole, carbetamide, carfentrazone-ethyl, chlomethoxyfen,chloridazon, chlornitrofen, chlorotoluron, cinidon-ethyl, cinmethylin,clefoxydim, clethodim, clodinafop-propargyl, clomazone, clomeprop,clopyralid, cloransulam-ethyl, cumyluron, cyanazine, cycloxydim,cyhalofop-butyl, daimuron, dazomet, desmedipham, dicamba, dichlobenil,dichlorprop, dichlorprop-P, diclofop-methyl, diclosulam, difenzoquat,diflufenican, diflufenzopyr, dikegulac-sodium, dimefuron, dimepiperate,dimethachlor, dimethametryn, dimethenamid, diquat-dibromide, dithiopyr,diuron, dymron, EPTC, esprocarb, ethalfluralin, ethofumesate, ethoxyfen,etobenzanid, fenoxaprop-ethyl, fenoxaprop-P-ethyl, fentrazamide,flamprop-M-isopropyl, flamprop-M-methyl, florasulam, fluazifop,fluazifop-butyl, fluazolate, flucarbazone-sodium, fluchloralin,flufenacet, flufenpyr, flumetsulam, flumiclorac-pentyl, flumioxazin,fluometuron, fluorochloridone, fluoroglycofen-ethyl, flupoxam,fluridone, fluroxypyr, fluroxypyr-butoxypropyl, fluroxypyr-meptyl,flurprimidol, flurtamone, fluthiacet-methyl, fomesafen, glufosinate,glufosinate-ammonium, glyphosate, haloxyfop, haloxyfop-ethoxyethyl,haloxyfop-methyl, haloxyfop-P-methyl, hexazinone, imazamethabenz-methyl,imazamox, imazapic, imazapyr, imazaquin, imazethapyr, indanofan,ioxynil, isoproturon, isouron, isoxaben, isoxachlortole, isoxaflutole,ketospiradox, lactofen, lenacil, linuron, MCPA, MCPB, mecoprop,mecoprop-P, mefenacet, mesotrione, metamifop, metamitron, metazachlor,methabenzthiazuron, methyldymron, metobromuron, metolachlor, metosulam,metoxuron, metribuzin, molinate, monolinuron, naproanilide, napropamide,neburon, norflurazon, orbencarb, oryzalin, oxadiargyl, oxadiazon,oxaziclomefone, oxyfluorfen, paraquat, pelargonic acid, pendimethalin,pendralin, penoxsulam, pentoxazone, pethoxamid, phenmedipham, picloram,picolinafen, pinoxaden, piperophos, pretilachlor, profluazol,profoxydim, prometryn, propachlor, propanil, propaquizafop,propisochlor, propoxycarbazone-sodium, propyzamide, prosulfocarb,pyraclonil, pyraflufen-ethyl, pyrazolate, pyrazoxyfen, pyribenzoxim,pyributicarb, pyridafol, pyridate, pyriftalid, pyriminobac-methyl,pyrithiobac-sodium, quinclorac, quinmerac, quinoclamine,quizalofop-ethyl, quizalofop-P-ethyl, quizalofop-P-tefuryl, sethoxydim,simazine, simetryn, S-metolachlor, sulcotrione, sulfentrazone,sulfosate, tebuthiuron, tepraloxydim, terbuthylazine, terbutryn,thenylchlor, thiazopyr, thiobencarb, tiocarbazil, tralkoxydim,triallate, triaziflam, triclopyr, tridiphane, and trifluralin.
 16. Theliquid herbicidal composition according to claim 1, comprising at leasttwo sulfonylurea compounds, wherein the sulfonylurea compounds areselected from: amidosulfuron and iofensulfuron; nicosulfuron andthifensulfuron methyl; nicosulfuron and prosulfuron; metsulfuron methyland iodosulfuron methyl; metsulfuron methyl and sulfosulfuron;metsulfuron methyl and thifensulfuron methyl; metsulfuron methyl andbensulfuron methyl; metsulfuron methyl and chlorsulfuron; metsulfuronmethyl and chlorimuron ethyl; metsulfuron methyl and tribenuron-methyl;tribenuron-methyl and thifensulfuron methyl; tribenuron-methyl andchlorimuron ethyl; tribenuron-methyl and bensulfuron-methyl;tribenuron-methyl and mesosulfuron; tribenuron-methyl andiodosulfuron-methyl; iodosulfuron methyl and mesosulfuron methyl;iodosulfuron methyl and amidosulfuron; iodosulfuron methyl andforamsulfuron; iodosulfuron and iofensulfuron; mesosulfuron andiodosulfuron methyl; foramsulfuron and iodosulfuron-methyl; rimsulfuronand thifensulfuron rimsulfuron and nicosulfuron; bensulfuron-methyl andthifensulfuron-methyl; or thifensulfuron-methyl and chlorimuron-ethyl.17. The liquid herbicidal composition according to claim 1, comprisingat least one sulfonylurea herbicide and at least one non-sulfonylureaherbicide, wherein the at least one sulfonylurea herbicide and the atleast one non-sulfonylurea herbicide are selected from:tribenuron-methyl and 2,4-D; tribenuron-methyl and MCPB;tribenuron-methyl and bromoxynil; tribenuron-methyl and glyphosate;tribenuron-methyl and fluroxypyr; tribenuron-methyl and dicamba;tribenuron-methyl and mecoprop-P; tribenuron-methyl and MCPA;tribenuron-methyl and clopyralid; tribenuron-methyl and carfentrazoneethyl; tribenuron-methyl and clodinafop; tribenuron-methyl andquinclorac; tribenuron-methyl and florasulam; nicosulfuron and dicamba;nicosulfuron and atrazine; nicosulfuron and flumetsulam; nicosulfuronand clopyralid; nicosulfuron and diflupenzopyr; nicosulfuron andmetolachlor; nicosulfuron and terbuthylazine; nicosulfuron andmesotrione; nicosulfuron and bentazone; metsulfuron methyl andacetochlor; metsulfuron methyl and carfentrazone ethyl; metsulfuronmethyl and imazapyr; metsulfuron methyl and aminopyralid; metsulfuronmethyl and fluroxypyr; metsulfuron methyl and mecoprop-p; metsulfuronmethyl and picloram; metsulfuron methyl and pyraflufen ethyl;metsulfuron methyl and propanil; metsulfuron methyl andglyphosate-ammonium; metsulfuron methyl and dicamba; metsulfuron methyland 2,4-D; bensulfuron-methyl and acetochlor; bensulfuron-methyl andbutachlor; bensulfuron-methyl and daimuron; bensulfuron-methyl andmefenacet; bensulfuron-methyl and indanofan; bensulfuron-methyl andclomeprop; bensulfuron-methyl and pretilachlor; bensulfuron-methyl andfentrazamide; bensulfuron-methyl and thenylchlor; bensulfuron-methyl andpentoxazone; bensulfuron-methyl and pyriminobac-methyl;bensulfuron-methyl and bromobutide; triflusulfuron methyl andsulfentrazone; iodosulfuron-methyl and isoxadifen-ethyl;iodosulfuron-methyl and propoxycarbazone; iodosulfuron-methyl anddiflufenican; iodosulfuron-methyl and fenoxaprop-P-ethyl;iodosulfuron-methyl and thiencarbazone-methyl mesosulfuron anddiflufenican; mesosulfuron and propoxycarbazone; foramsulfuron andisoxadifen ethyl; foramsulfuron and thiencarbazone-methyl; foramsulfuronand cyprosulfamide; thifensulfuron-methyl and flumioxazin;chlorimuron-ethyl and acetochlor; chlorimuron-ethyl and flumioxazin;chlorimuron-ethyl and imazethapyr; chlorimuron-ethyl and metribuzin;chlorimuron-ethyl and sulfentrazone; pyrazosulfuron-ethyl andpretilachlor; pyrazosulfuron-ethyl and benzobicyclon;pyrazosulfuron-ethyl and dimethametryn; rimsulfuron and mesotrione;rimsulfuron and metolachlor; and rimsulfuron and dicamba;
 18. The liquidherbicidal composition according to claim 1, further comprising at leastone inorganic salt selected from the metal carbonates and metalphosphates of Na, K, Ca, Mg or Al.
 19. The liquid herbicidal compositionaccording to claim 1, wherein the C₁-C₁₂ organic lithium salt is a C₁-C₈organic lithium salt.
 20. A method for improving chemical stabilisationof a sulfonylurea herbicide in a liquid composition comprising anon-aqueous solvent system, comprising adding to the liquid compositionat least one inorganic or C₁-C₁₂ organic lithium salt, preferably aC₁-C₈ organic lithium salt.
 21. The method according to claim 20,wherein the at least one lithium salt is lithium acetate and thesulfonylurea is selected from iodosulfuron-methyl or salts thereof,halosulfuron-methyl or salts thereof, metsulfuron-methyl or saltsthereof, pyrazosulfuron-ethyl or salts thereof or amidosulfuron or saltsthereof; or the at least one lithium salt is lithium carbonate and thesulfonylurea is selected from iodosulfuron-methyl or salts thereof, orhalosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium formate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium phosphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium chloride and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; or the at least one lithium saltis lithium sulphate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; the at least one lithium salt islithium octanoate and the sulfonylurea is selected fromiodosulfuron-methyl or salts thereof; foramsulfuron or salts thereof;chlorsulfuron or salts thereof; pyrazosulfuron-ethyl or salts thereof;amidosulfuron or salts thereof; or halosulfuron-methyl or salts thereof;the at least one lithium salt is lithium benzoate and the sulfonylureais selected from iodosulfuron-methyl or salts thereof; or the at leastone lithium salt is lithium citrate and the sulfonylurea is selectedfrom iodosulfuron-methyl or salts thereof.